| |
What's new?
11NOV2024
James Heddle published an excellent paper on how to
amplify a life concert with utmost fidelity: See
Towards a Better Integration of Room Acoustic and Sound
System Design for Multipurpose Venues.pdf
06OCT2024
Another "Best Sound of Show" for LINKWITZ LX621.4MG at
Süddeutsche Hifitage Stuttgart:
Best sound of the show – Linkwitz Lab!
“Had the dipoles of the
unfortunately deceased but still legendary HiFi engineer Siegfried Linkwitz
not been placed right next to the main entrance in the foyer, not played quite
loudly, and looked striking,
we probably would have walked past.
But instead, we stayed and
experienced a lesson in open, transparent, and impulsive-dynamic sound with an
almost outrageously groovy bass.
Sure, the open area by the main staircase was not an ideal place acoustically to
judge the active speakers with the characteristic open baffle.
Nevertheless, the demonstration
showed the incredible potential of this technology – it sounded deeply spatial,
three-dimensional, and relaxed.
We were thrilled!”
read more
30AUG2024
At Chicago / Munich / Singapore
shows, we presented minimal mic´ed recordings, that were captured in
conventional multi-mic method simultaneously.
In "blind" A/B-rendering, 9/10 voted for the minimal
mic´ed version, more natural, spatial,....
In cooperation with experienced minimal-mic sound
engineers, we are launching a recording contest for yound sound engineers /
students,
running from Sept 1st 2024 til Jan 31st 2025.
For details see
here.
01JUN2024
MUNICH 2024, the biggest HiFi Show in the world,
see LX521 reports
here.
AXPONA 2024 Chicago: In the "LINKWITZ
Parlor", four fascinating presentations of top-notch industry experts gave deep
insights into recording and postprocessing technques. Reports and videos can be
found here.
LX521.4MG is Product of the Year 2024, read more
here
16JAN2024
HomeTheaterHifi reviewed the
LINKWITZ LX521.4MG system:
“The LX 521.4MG genuinely sounds like no
other loudspeaker out there and they come
the closest that I have heard in my home to
recreating a convincing musical event.”
07 NOV 2023
Tracking Angle Magazine reviewed LX521.4MG:
“…It is the perfect choice
for those who are not enthusiasts but still value a superior listening
experience, as well as for experienced audiophiles who are searching for
The Holy Grail.
That makes it a “unicorn
product” in our industry.”
26 OCT 2023
AXPONA 2023 and the Munich show 2023. If
you did not attend AXPONA may want to
read more..
Thank you: The Best Of AXPONA
award for LINKWITZ
Hifideluxe Munich 2023, first time, we
can report from a demo with an
excellent analog source in a decent showroom.
Read more here
25 OCT 2023
At AXPONA,
discovered the
"Breakthrough of the Year"
01 OCT 2023
New:
Tight tolerance (1%) Polypropylene capacitors with
small footprint (RM 5mm) are a good choice for use in audio filter applications.
A small overstock from production is available
here.
And you may find THT metal film resitors (1%)
here.
18 Jan 2023
April 14- 16, 2023,
Renaissance Schaumburg Hotel & Convention Center | Schaumburg, IL
AXPONA , room
#1539. Contact us via email
info@linkwitz.com for a ticket discount
code.
30 NOV 2022
ATTENTION, misleading LXmini YouTube
video:
Substantial deviation between the original LXmini acoustic response curves and
those curves, published on YouTube!
read more..
22 NOV 2022
Capital Audio Fest 2022.
Nov 11th-13th we displayed the LINKWITZ
LX521.4MG system
with
PowerBoxes 6pro NCore precision analog.
New cascaded ASP inside.
We are glad to be horored with
another "Best of"
Thank you as well for the many individual
"Best of Show" compliments.
Read more...
08 JUN 2022
Frank Doris (Copper Magazine) was
visiting our LINKWITZ room at AXPONA 2022
read more..
17 MAY 2022
AXPONA 2022, finally, life is back, we enjoyed it,
....others, too:
Thank you: The BEST OF SHOW award for LINKWITZ
read more..
15 MAY 2022
Meet us at
Pacific Audio Fest 2022. Suite 1370, 13th Floor.
July 29 - 31 2022, SEATTLE,
Doubletree Hilton Sea-Tac Washington.
Enjoy the "uncanny" (TheAudioCritic)
sound stage illusion of Linkwitz
LX521.4, the new
LINKWITZ22MG driver and
PowerBoxes 6proNCore precision analog.
Read
more....
02 May 2022
AXPONA 2022, finally, life is back, we enjoyed it,
read more..
24 DEC 2021
Jan 14-16, 2022, Hyatt Regency, Newport Beach.
### AudioCon has been postponed ###
In three weeks, we will be exhibiting in Los Angeles. Read
more
11 DEC 2021
More reports drop in from
customers, that did the upgrade to LX521.4MG (new LoMid driver
LINKWITZ22MG and cascaded ASP v2.0 in PowerBox or as separate unit) I "...I
didn’t think there was that much room for improvement in the LX521. I was
wrong!.." read more
21 NOV 2021
"Loudspeaker evaluation is not like wine tasting".Loudspeakers have an absolute reference: The live event.
A quite impressive demonstration of LX521.4MG´s performance. Scroll all the way
down here
10 NOV 2021
Intercontinental air travel needs to
reduce its climate effect. My sons engineering bureau (Felix Brenner M.Sc., aerospace
engineer) suggests methane (initially fossil, then green) for powering future intercontinental
aircraft. Why (green) methane ? Check out
www.green-aircraft.com
03 NOV 2021
OpenHouse, Saturday, Nov
13th 2021
10.00h-1400h
After a pandemic pause, Eike Linkwitz
likes to invite you to our first OpenHouse event this year. Listen to LX521 and
LXsirius in Corte Madera / 8mi north of Golden Gate Bridge. This event is
available exclusively for fully COVID-vaccinated participants. Get your seats
via email. to info@linkwitz.com
Driving and parking details will be provided. Pandemic rules (FFP2 masks) apply.
Extension of this event.
Additional LX521.4 audition Sunday, Nov
14th 2021
10.00h in Healdsburg/CA, Sonoma Valley get free tickets via email to Don Naples
24 OCT 2021
 SEAS
LXmini driver sets in silver and special edition black restocked.
www.LINKWITZ.store started to ship
LXmini kit backorders
in sequence of the wait list.
19 OCT 2021
More feedback for an upgraded LX521.4
system with
PowerBox 6pro precision analog and
LINKWITZ22MG
drivers:
Hi Frank
I spoke with Don N. yesterday, and he and I were discussing how much your work
on this revision has improved the sound on the LX521.
He is pretty much blown away, remarking that it’s pretty much the best sound
he’s ever heard.
As you know, he had, up to now, actually favored his Orions. But this version
simply ended that preference for good.....
Best , John S.
18 OCT 2021
For members of San Francisco Audio Society, only (You may
become a member, though).
https://sanfranciscoaudiophilesociety.com/
|
San Francisco
Audiophile Society
Linkwitz LX521
The Reference Speaker
Demo
|
|
Saturday, November 6, 2021
10:00 to 4:00 PM PST
|
|
Dear all,
Join us for
an opportunity to hear the latest version (revision) of the Linkwitz
open baffle LX521 The Reference speaker system (https://linkwitz.store/product/lx521/).
With new drivers, newly re-designed analog active crossovers and
power amps resulting in a speaker system that sounds truly
exceptional!
Here’s an excerpt from
a review of the LX521 The Reference speakers by Jack Vad, San
Francisco Symphony, GRAMMY winning Producer & Engineer:
"I didn’t have any
other speakers that could reveal as accurate a sound stage, do so
with tonal & timbral neutrality, and seemingly bypass the room …
used for the final production stage mix qualification of all San
Francisco Symphony SACD download releases that I’ve produced during
the last three years; they are an indispensable tool"
The event will be
in-person at Don’s in Healdsburg and will be an open-house format
from 10:00 am to 4:00 pm. Lunch will be provided and the cost for
the event is $10. Click on the link below to sign up for the event.
Masks will be required, vaccinated and no one with a temperature of
100.4 or greater within a week of the event.
The address of the
event will be sent to the attendees a day or two before the
event....
11 OCT 2021
Another impressing
testimonial about LX521 from NY.
10 OCT 2021
OpenHouse, Saturday, Nov
13th 2021
10.00h-1400h
After a pandemic pause, Eike Linkwitz
likes to invite you to our first OpenHouse event this year. Listen to LX521 and
LXsirius in Corte Madera / 8mi north of Golden Gate Bridge. This event is
available exclusively for fully COVID-vaccinated participants. Get your seats
via email.
Driving and parking details will be provided. Pandemic rules (FFP2 masks) apply.
07 OCT 2021
Audition opportunity, starting today!
New LX521.4 (GreyOak), new
LINKWITZ22MG
drivers and new
PowerBoxes 6pro
Ncore precision analog (cascaded ASP)
are ready for audition in
Healdsburg / CA. Fed by a decent turntable or by a superb DAC as music
sources.
Contact Don Naples by email for an
appointment. (Pandemic rules apply).
03 OCT 2021
Make sure, you re getting the best out of
your LX521 system by proper placement:
"Frank, I am very happy to report that this system is
simply sensational. It sounded terrific when I fixed the polarity on the one
woofer, (FB:Correct polarity test is always a must) but the placement
still added a significant improvement. I’ve been listening every night since
you gave me the placement specifications and they are incredible. Great job
Frank. Thanks, Jeff " (Jeff R., Long Island, USA, PowerBox 6pro Ncore precision
analog,
LINKWITZ22MG
upgrade)Find some
placement ideas and what you might
expect as sound stage depth.
09 SEPT 2021
Michael Fremers
Analog Corner #27 about David A. Wilson, Wally Malewicz, Siegfried Linkwitz
28 JUL 2021
Coping
with Corona through Music
Research of the
Max Planck Institute for Empirical Aesthetics showed,
that music can strengthen resilience of both the individual and the community.
Read more..
24 JUL 2021
For older ASPs,
notch/gain adjustment pcbs for the LX521.4 low distortion upgrade
LINKWITZ22MG are
available as bare pcbs.
If you have an
older LX521.4 ASP and intend to implant this pcb DIY, just request a
free pair of notch/gain adjustment boards in the remarks field of
your LINKWITZ22MG order.
06 JUN 2021
The new cascaded
LX521.4
ASP comes with optional circuit adaptation for
low-distortion LINKWITZ22MG (low mid channel).
Older ASPs may be retrofitted by a
small notch / gain adjustment circuit . More details on LX521 owner support page.
24 MAY 2021
We are pre-planning to continue OpenHouse
auditions in Corte Madera/CA, as soon as the pandemic situation permits.
You may pre-register via email
and get a personal update on the final dates for
the OpenHouse event.
Furthermore, you
may listen to LX521 in Houston/TX, contact
sales@perfectstereo.com
for an appointment.
In
Germany, LX521 and
LXsirius+2 are ready for audition near Stuttgart, just send an email to make
an appointment.
10 MAY 2021
After receiving several mails/calls, complaining about broken "LinkWitz" bluetooth headphones
and other fake products, it was time to protect the
name Linkwitz.
Linkwitz®,
Linkwitzlab®,
LX521®
and LXmini®
are now internationally registered trademarks!
13 APR 2021
Distortion Measurements of midrange drivers
display intermodulation and harmonic distortion products.
See how the new LINKWITZ 22MG measures vs the former leader. Scroll down
here
10 APR 2021
some more thoughts on crossover
topologies can be found here
03 APR 2021
magicLX521.com moved to LINKWITZ.store
Find LINKWITZ® turnkey systems, PowerBoxes, DIY-kits, LINKWITZ®
construction plans and look new developm
Cascaded LX521® precisionASP v2.0 and
LINKWITZ®
22MG (improved LX521 lo-mid driver, ultra low distortion motor, magnesium cone).
All your account details have been transferred, just establish a new
password.
Enjoy surfing!
31 JAN 2021
New LINKWITZ
Audition Lounge, Houston/Texas.
We are happy to announce a new location for you
to verify our claims and our customers testimonials about this extraordinary
loudspeaker system.
At Perfect Stereo, Mr. Fernando Maldonado will be
happy to introduce you to LINKWITZ LX521.4, run by PowerBoxes 6pro Ncore.
"Be transported to
new sonic vistas as you enjoy a glass of wine and savor your own music in our
comfortable listening room."
You
may book your private appointment today by phone +1 713 253 5318
or by email sales@perfectstereo.com
03
October 2020
Jan
and Kim from Denmark took a 1000km trip to listen to LX521.4 in Stuttgart.
They
both own dipoles, have listened to multi-thousand dollar systems before
....and
still never heard such a 3-D soundstage illusion, ever.
21
September 2020
Siegfried
Linkwitz´ design provides listening joy on Barbados Island, see LXmini
gallery
10
September 2020
Find
new pictures of beautiful LX521 setups in the gallery
29 August 2020
Artist
Jim AVIGNON enjoyed listening to LXsirius . He is the creative painter of
the Jim
Avignon special edition of LXsirius.
29 August
PCBs for ORION ASP and LX521(.3) ASP have restocked. Check out here.
20
July 2020
We
can offer another audition for Linkwitz LX speaker systems in Germany
Saturday
25.07.2020 near Stuttgart Airport. Maximum 2 persons per time slot, due to
pandemic regulations.
Contact
info@LINKWITZ.store
for your individual time slot
22
June 2020
We
received more requests to experience Linkwitz
loudspeakers and are looking forward to
the next OpenHouse auditions in Stuttgart and San Francisco.
Dates
have not been set, yet. Number of participants will be limited to be in line
with pandemic regulations.
You
may put yourself on the reservation list by sending an email
to info@LINKWITZ.store
27 March 2020
More LX521 variants available from
LINKWITZ.store
Perfect
craftsmanship with American Walnut baffles & bridges, finished by and a
9-layer high gloss finish:
....and some sandwich top-baffles: anodized aluminum - Panzerholz
27 March 2020
LXsirius, individual Artist Edition by Jim
Avignon.
Individually painted pieces of artwork: Painter and
musician Jim Avignon does a limited number of individual LXsirius pairs, maximum
joy for ears and eyes:
Each LXsirius pair, Jim Avignon Edition, comes with a certificate of
authenticity.
Contact
info@LINKWITZ.store
for details.
27 March 2020
Meet
us at AXPONA , room #725, !!! cancelled !!!
01 March 2020
OpenHouse
in Corte Madera
The
first OpenHouse this year was (again) fully booked. We had visitors from all
over the US flying in or coming over by car.
Visitors could convince themselves how well Linkwitz desigs work w i t h
the room, creating a perfect soundstage illusion.
Not only in the sweet spot, but
as well when wandering around in the room. Craig Allison provided some
music of his own
Blues Band, so you could
directly compare the recorded voice to the "real thing".
Furthermore, we were able to answer several questions from interested visitors
and explain Siegfried Linkwitz`
form-follows-function design.
A big THANK YOU to Eike Linkwitz for hosting the OpenHouse
with tasty food and beverages
02
February 2020
New
supplier for ORION speakers in the UK:
KJF
Audio delivers ORION kits. Details will show up on the KJF website,
soon.
Contact Stefan Whatcott: admin@kjfaudio.co.uk.
They also ship to other
countries.
21
December 2019
LX loudspeaker audition OpenHouse near
Stuttgart airport
Interested music lovers were driving/flying in from several European countries
like Belgium or Estonia.
Besides getting to know
Siegfried Linkwitz` design principles, we had quite some time to listen to
various music styles and
experience the deep, believable and precise soundstage illusion
of LXsirius+2 and
LX521.4.
Configurations in use were
In the (ca 17sqm) office
room:
JRiverID > AFI-USB
> Oppo HA1 as DAC > PowerBox 6pro NCore precision analog > LXsirius+2
In the living room
Linn Acourate DS >
PowerBox 6pro NCore Master&Follower, LX621.4, American.Walnut, Be tweeters
10 November 2019
Visitors were happy , to find Eike, Greg
and Ed demoing the LXsirius+2 (dull white and dark anthracite
color)
at this years Burning Amp
festival in Ft Mason / San Franciso:
09
November
This years 4th OpenHouse was again fully
booked, find some pictures here
Next OpenHouse:
Corte Madera Early 2020 , details TBD, you may
already make a reservation via email
Eike Linkwitz once more likes to invite you to an unique
LX loudspeaker demonstration at the home of Linkwitzlab in Corte Madera. Enjoy
the realistic music presentation of LXsirius, LXsirius+2 , LX studio or
LX521.4.
Frank Brenner will be availabe for Q&As.
Send an email
for number of place reservations at either 10:00 am, 11:30 am or 1:00 pm and for
driving directions. Please state your preference in listening to a specific
model of LX speakers (LXmini, LXsirius, LXsirius+2 , LX studio or
LX521.4). Repeaters are welcome!
28
October 2019
 published an obituary
on Siegfried Linkwitz´ work and achievements (September 2019 issue).
22
September 2019
See LXsirus
playing in a music paradise (record store "EINKLANG") and photos
from OpenHouse in Stuttgart.
28 August 2019
Rich Isaacs
enjoyed our previous OpenHouse, see here
, COPPER magazine #92.
27 July 2019
This years 3rd OpenHouse was again fully
booked, find some pictures here
27 April 2019
today, Eike Linkwitz hosted this years second Open House, continuing Siegfrieds legacy of making his
achievements accessible to music lovers. The event was ,again, fully booked.
 
Some participants were driving 10 hours by car
to enjoy this special event!
As always, an OpenHouse is a great opportunity to exchange thoughts, get answers and to
convince oneself on what really matters for a believable / live-like rendering
of acoustical scenes.
This was also an opportunity to listen to the new LXsirius,
the slim full range loudspeaker. Demoed in a LXsirius+2 configuration
We switched between Jazz, Classical, Blues and Rock on
- LXsirius,
- LXsirius+2 (=with LXsub2 woofers) ,
- LXstudio (= with LXsub4 woofers) and
- LX521.4
Craig presented well recorded music as well as rarities and gems. But as
well tracks , that are still available,
e.g Charlie Hadens bass solo (from 2:20 on) in "Els Segadors" with Carla Bley et al.
The interested audience got familiar to the design
principles of these outstanding loudspeaker systems. Time for discussion and
questions. And of course time to hear these unconventional loudspeakers
perform, fascinating the audience with their stable, live-like illusion of
musical performance, that does n o t collapse when leaving the "sweet
spot".
As the music could not be identified as "coming from a
speaker" , we were asked several times, if LX521 or LXsirius+2 was on
duty. Even, when listening to LXsirius+2 , some music lovers believed, that
LX521 was playing. LXsirius+2 was recognized as slim speaker with big performance.
Visitors could convince themselves by wandering around in
the room: The phantom imaging remains stable, no matter where you listen
from.
No Room correction at work, no fancy room treatment, no boutique cables. But
intelligent engineering and a huge wealth of experience allowed the design
of these transducers, that work so well with the room.
Setup details :
Generally, PowerBox
6pro Ncore allows filter loading for all Linkwitz LX models.
However, for the OpenHouse each system got its own PowerBox
6pro Ncore to allow a quick jump between LX521 and LXsirus and their
sources.
Eike prepared tasteful finger food and beverages. James took the right pictures
to capture the setting in Corte Madera.
We have already bookings of repeaters, that want again join us at the next
OPEN HOUSE, this summer.
Check out this news page, as well as
www.LINKWITZ.store
to be noted about future Open House dates.
LX521.4 may be built as
comfort DIY kit,
top-baffles, baffle supports and bridges
fully assembled in American Black Walnut
veneered multi-layer birch ply.
V-Frame woofer kit in dark anthracite HDF.
Fully hidden cabling is already inserted in top-baffles
and in woofers side panels.
Bridges assembled with 45deg
miters
There is
a new, enhanced ASP for LX521.4
available. Based on physically small feedback loops with
single OpAmps and
tight component tolerances for improved L/R
channel matching.
A two step rumble filter for
phono application may be switched into the signal path.
Jan 19th 2019, Eike Linkwitz hosted the first
Open House of the year, continuing Siegfrieds legacy of making his
achievements accessible to music lovers. The event was fully booked!
As always, a great opportunity to exchange thoughts, get answers and to
convince oneself on what really matters for a believable / live-like rendering
of acoustical scenes.
This was also an opportunity to listen to the first pair of just launched LXsirius,
the slim full range loudspeaker.
 
We switched between Jazz, Classical, Blues and Rock on
- LXsirius,
- LXsirius+2 (=with LXsub2 woofers) ,
- LXstudio (= with LXsub4 woofers) and
- LX521.4
A special highlight was listening to the CD of Craig Allisons Blues
Band.
Craig was here and partially singing along. Everyone could instantly
recognize how well timbre, body and tonality of "recorded" and
"live" match on this LX521.4 system.
The interested audience got familiar to the design
principles of these outstanding loudspeaker systems. Time for discussion and
questions. And of course time to hear these unconventional loudspeakers
perform, fascinating the audience with their stable, live-like illusion of
musical performance, that does n o t collapse when leaving the "sweet
spot".
 
Visitors could convince themselves by wandering around in
the room: The phantom imaging remains stable, no matter where you listen
from.
 
No Room correction at work, no fancy room treatment, no boutique cables. But
intelligent engineering and a huge wealth of experience allowed the design
of these transducers, that work so well with the room.
Setup details :
Eikes fantastic catering (home-made Brownies and more) was a pleasure to
everyone.
  
Check out this news page, as well as
www.LINKWITZ.store
to be noted about future Open House events.
- 15 December 2018
LX loudspeaker audition --- Open House in Corte Madera ---
Saturday, January 19, 2019 --- from 10 am to 4 pm.
Eike Linkwitz invites you to an unique LX loudspeaker demonstration at
the home of linkwitzlab in Corte Madera.
Enjoy the realistic presentation of LXmini, LXmini+2 , LX studio or LX521.4.
Frank Brenner will be availabe for Q&As.
Compared to the LXmini+2 driven
from a single PowerBox the LX521.4 has obviously higher output
capability at all frequencies and/or lower distortion. But in all other
respects the music and acoustic scene experiences are remarkably similar.
The LX521.4 gives a convincing sound illusion regardless of the type of
music played and yet the speakers are revealing of every subtle detail in
the recording to a mix and mastering engineer.
Send an email for number
of place reservations at either 10:00 am, 11:30 am, 1:00 pm, or 2:30 pm and
for driving directions.
Please state , if you are interested in listening to a specific model
of LX speakers (LXmini, LXmini+2 , LX studio or LX521.4)
See you then, Eike Linkwitz
& Frank Brenner.
- 29 November 2018
LXmini / LXmini+2 / LXstudio may be driven by
digital (DSP) or analog (ASP)
signal processors.
The links above show options for DIY as well as turn-key solutions.
- 24 November 2018
Siegfried Linkwitz´ wife Eike continues the
practice of OPEN HOUSE listening experience and sharing of thoughts at the
home of "linkwitzlab".
The next OPEN HOUSE in Corte Madera will take place in early 2019. Details
tbd.
- 24
Floyd Toole, John Vanderkooy and Laurie Fincham found honorable words on Siegfried Linkwitz here
- 30 September 2018
BURNING AMP
- in Ft Mason/San Francisco
SL was sorely missed. Gladly, his wife Eike
Linkwitz agreed to attend the BAF.
Nelson Pass and Laurie Fincham found honoring words for SL in their speeches.
Everyone was invited to write down his individual "Thank you, Siegfried
Linkwitz" in an open book.
Find more BAF 2018 news here
Siegfried Linkwitz (1935-2018).
A warm hearted freethinker, pioneer, innovator and friend passed away. It´s
sad..... Frank Brenner
"Celebration of Life" for Siegfried Linkwitz, Sunday October 14, 1:30PM - 4:00PM,
at the Mill Valley Community Center ,180 Camino Alto, in
Mill Valley, 8 miles north of the Golden Gate Bridge.
Everyone is welcome!.
- 09 August 2018
BURNING AMP
- Sunday Sept.30th in San Francisco -
There will be a LXmini +2 demo. We plan to have a new balanced version of
Nelson Pass` analog JFET buffer/equalization/crossover for LXmini / LXmini+2
/ LXstudio.
Hope to see you at Ft Mason. Regards, Frank Brenner.
- 28 January
2018
Amplifiers - The Emotiva A-800, 8 x 50W amplifier,
could be a low cost, satisfactory performance solution for LXmini, or
LXmini+2, or LXstudio applications.
- 22 December
2017
Links - DNA and Its Epigenetic Potential, an Antenna for
Cosmic Emissions:
Driving
Force in Evolution and Energy Transmission?
-
| 20
December 2017
Please note:
I no longer sell directly any of
my previously offered software or hardware products. I have retired.
Construction plans for LINKWITZ LAB designs, parts
kits and turnkey loudspeaker systems are available from
www.LINKWITZ.store
Construction plans for LINKWITZ LAB designs and
parts kits are available from
www.madisound.com
The Construction plans are required license to
purchase parts kits and assembled systems.
| Terms
& Conditions |
The OPLUG
Forum is the place for advice and help
Have fun! |
- 10 December
2017
Links - Here are three books well
worth exploring, as you wonder about our place in the universe
- 6 December
2017
BURNING AMP - From 2008 to 2017
- 26 November 2017
BURNING AMP-2017 - Baffle Diffraction Versus Neutral Sound
Dispersion - one of four presentations, which are now on YouTube
- 15
November 2017 - BURNING
AMP
 |
 |
We played the LXmini+2 loudspeaker
system driven by an ASP, which was derived by Nelson Pass from my
original DSP transfer functions to our mutual satisfaction and
enjoyment.
More photos ... |
Nelson Pass - Siegfried
Linkwitz - Frank Brenner
We collaborated on analog crossover/equalizers (ASP) for LXmini and
LXmini+2. They will become available in the DIYAUDIO
STORE |
5 November 2017
BURNING AMP
- Next Sunday in San Francisco -
I plan to give a talk about "Baffle design, diffraction, radiation pattern and stereo imaging"
(PDF).
Nelson Pass will bring a pair of LXmini with LXsub2 and his 2-way and 3-way
Analog Signal Processors using only JFET
buffer stages for equalization and crossovers. Frank Brenner will bring
a proto of his PowerBox
with 2-way and 3-way ASP built-in.
-
26 October 2017
Links - Bruno
Putzeys' thoughts on MQA
- 9
September 2017
LXmini ASP - An
update of the Analog Signal Processor, Burning Amp 2017 and an
interview with Nelson Pass
- 5
September 2017
LX521.4 ASP - Analog
Signal Processor assemblies and printed circuit
boards
- 4 September 2017
| Links -
Interview
with 'Esprit Yoga Magazine'
Skype Satsang with Mooji
Living
in the Joy of Our Natural Being |
|
- 5
August 2017
Links - Artificial
accuracy - The Metrology of Quality, Quantity and
Convenience - Context and Stories
- 1 August 2017
Links - A story of
purpose - The two most important days of our lives ...
- 1 August 2017
LXmini, LXmini w/Subs, Orion4d turnkey systems. California
Audio Show 2017 - CAS7
Awards
- 1 July 2017
Sea Ranch - As seen through
the eyes of a famous architect's son
- 27 June
2017
Links -
What happens in your brain when you pay attention?
- 26 June
2017
Recent
reading - Books of interest to me
- 25 June
2017
Peter
Aczel - A dear friend has died
- 12 June
2017
My current setup -
I
am done and happy -
- 14 May 2017
Archimago's
Musings - On Being an Audiophile, Rationality, and Respectability
(Thoughts on the Hardware Audiophile Hobby)
- 13 May 2017
Links - What is so special
about vinyl?
- 11 May 2017
LX-Store - Analog
Signal Processor - ASP.4 - for the LX521.4 loudspeaker
- 11 May 2017
Links - Dynamic Range: No
Quiet = No Loud
- 10 May 2017
Links - Music with a
Cochlear Implant?
- 10 May 2017
Links - Archimago's
Musings - A 'more objective' take on audiophile topics among other
thoughts ...
- 10 May 2017
Links - American
Radio History - a nice archive of old audio related
publications
- 24 April 2017
LXmini ASP - Analog crossover/equalizer
for the LXmini
- 20 April 2017
LX521 Supplies - Updates
about my LX521.4 Systems and ASP.4
- 8 April 2017
My current setup - Hurrah! -
ASP.4 System's exemplary performance confirmed to me at today's Open House:
- 3 April 2017
Issues in speaker design -
Power amplifier distortion at 1 W & 100 mW output for a 1 kHz and
5.5 kHz sine tone combination
- 1 April 2017
Issues in speaker design -
Group delay distortion at the low frequency end of a
loudspeaker
-
26 March 2017
Open House in Corte Madera --- Saturday, April 8, 2017, from 11 am to 5 pm.
Hear the LX521.4 loudspeaker with PowerBox 6pro NCore and compare
it to the LX521.4 with ASP.4, OPPO Sonica DAC and AT528NC 8-channel
power amplifiers. Have some fun during Tax time.
Send me an email
with number
of visitors, for time of your arrival and
for directions to my house.
Review:
My current setup
-
17 March 2017
My current setup - I intend to upgrade
my LX521.4 electronics in Sea Ranch
-
16 March 2017
Links - Technology Trends
- High Resolution Audio
-
4 March 2017
Links - The Art of Listening -
from the artist's and producer's perspective
- 28
February 2017
www.LINKWITZ.store -
OPEN HOUSE in Stuttgart, Germany, on Saturday, March 25th.
Contact Dr. Frank Brenner
for directions
- 25
February 2017
Links - Interview with
industrial designer Dieter Rams
- 22
February 2017
KII Audio THREE
loudspeaker - Yesterday I listened to the remarkable Kii-THREE
loudspeaker
- 11
February 2017
www.LINKWITZ.store -
Dr. Frank Brenner has opened the magicLXaudio store. (now
LINKWITZ.store)
Here you find the LX521, LXstudio, LXmini+2 and LXmini offered as kits
and turnkey systems of the highest quality.
PowerBox electronics use Hypex NCore modules and DLCP for lowest
distortion, multi-channel power amplification.
A re-clocker is offered, which completely removes jitter from a USB
audio data stream.
The store fulfills my dream of giving ready access to sound reproduction
equipment of the absolutely highest performance,
to help music lovers who need more than my DIY construction plans to put
together an LX loudspeaker system.
- 9 February 2017
Publications - The Magic in 2-Channel
Sound Reproduction - Why is it so rarely heard?
- 30 January 2017
Engineering
information - Loudspeaker Systems with Optimized Wide-Listening-Area
Imaging
- 29 January 2017
Linkwitz
Lab inspired designs - LX521 from Switzerland, the French part
- 29 January 2017
Linkwitz Lab
inspired designs - A 3D-printed desktop 'LXmini'
- 29 January 2017
Linkwitz Lab
inspired designs - The Manger driver used as dipole
- 28 January 2017
Engineering
information - SEAS DXT wide dispersion tweeter
- 28 January 2017
Linkwitz
Lab inspired designs - The Ultimate DIY Sound System Is at Hand
- 26 January 2017
The LXmini+2 or LX521.4 with PowerBox
setups render stereo recordings to a degree of realism that I had
never experienced before. |
LX Loudspeaker
Audition -
Corte Madera, 1/21 &1/22, 2017
Here was an opportunity to hear the LXmini+2
driven from a PowerBox 6pro NCore from
www.LINKWITZ.store.
from OPLUG
LXmini+2
at Burning Amp 2016
Equal time was spent to listen to the PB 6pro
Master with an additional PB 6pro Follower driving left and right
speakers of the LX521.4 system.
Either system can provide a fully satisfying and
realistic sound experience of emotional impact. |
- 14 January 2017
Other
designs - BeoLab90 Loudspeaker - I had a chance to listen and I
am impressed
- 12 January 2017
Other
designs - Lexicon SL-1 Loudspeaker - A unique design with
horizontal beam steering
- 8 January 2017
LX loudspeaker audition --- Open House in Corte Madera --- January 21 and
22, 2017 --- Saturday and Sunday from 10 am to 5 pm.
Frank Brenner and I installed a second PowerBox 6pro NCore
into my system and I now can also drive the LX521.4. - Fantastic!
Compared to the LXmini+2 driven
from a single PowerBox the LX521.4 has obviously higher output
capability at all frequencies and/or lower distortion. But in all other
respects the music and acoustic scene experiences are remarkably similar.
The LX521.4 gives a convincing sound illusion regardless of the type of
music played and yet the speakers are revealing of every subtle detail in
the recording to a mix and mastering engineer.
During the Open House I will demo the LXmini+2 and LX521.4 full-range
systems driven from NCore PowerBoxes. I can also change over to the LXmini
and/or my miniDSP4x10HD and ATI amps system, if desired.
Frank Brenner will not be present. He had to cancel his visit.
Send me an email for number
of place reservations at either 10:00 am, 11:30 am, 1:00 pm, or 2:30 pm and
for directions to our house.
- 18 December 2016
LX521.4 builders might check their
Owner Support page for an ASP.4 proposal
- 22 November 2016
Links
- Room Acoustics for Listening
- 21
November 2016
So, what? -
Come into my parlor, said the spider ...
-
17 November 2016
LXmini+2 with PowerBox 6pro
NCore - Fantastic! The most realistic rendering of sound events and
sound scenes,
which I have ever heard in my living room!
-
16 November 2016
Read more about BA 2016 at
www.LINKWITZ.store
Read about possible LXmini+2
Stereo System demo's |
Burning Amp 2016
We showed the LXmini+2 driven by a PowerBox 6pro - NCore. Input to
the PowerBox came from music files on the Hard Drive of my Laptop PC
using JRiver for playback. The electrical USB output signal was
converted to optical by a AFI-USB HF Noise Blocker & Re-clocker
before being applied to the DLCP in the PowerBox.
This is an absolutely superb audio system. It
was immediately apparent to our listeners, even in the highly
reverberant acoustics of the very large demo room at Fort Mason. More
about the sound ...
Frank Brenner and I plan to have an Open
House in Corte Madera in January, probably Saturday and
Sunday, 1/21 & 1/22, if Frank Brenner can get his A380 flight
schedule aligned with that date. |
-
3 November 2016
3.4 - The LXmini
woofer - A new chapter in 'My Conversations with Fitz'
-
2 November 2016
Burning Amp 2016 -
Sunday, November 13, is coming up fast. My plans have changed. I will bring LXmini+2
speakers to be driven from a PowerBox 6pro NCore, which Frank Brenner (www.LINKWITZ.store)
will have flown in on the day before. (He pilots a Lufthansa A380 from
Frankfurt.)
The PowerBox combines a Hypex DLCP with six NCore power amps, 2x100W,
2x125W, 2x250W. So it is able to feed all LXmini, LXmini+2 and LXstudio from
one single unit (€2490 plus VAT). For LX521.4, it takes one PowerBox 6pro
NCore per side.
-
26 October 2016
Links - Loudspeaker
Cabinet Diffraction
-
12 October 2016
Burning Amp 2016 -
Sunday, November 13. I will bring the LX521.4 speakers and Frank Brenner (www.LINKWITZ.store)
his PowerBox 4180 (Hypex DLCP with UcD power amps) to drive them.
-
12 October 2016
Other designs - ONO
Audio and the LXmini
-
4 October 2016
Acoustics and
Mechanics - My conversations with Fitz continue
- 19
September 2016
LX-Store - Updated list of
ATI power amplifiers, which are in production and available from Linkwitz
Lab
for LXmini, LXmini+2, LXstudio and LX521.4 loudspeaker products. ATI just
introduced the AT52xNC line of
Hypex NCore based power amplifiers.
- 12
September 2016
LXmini owners using the miniDSP 2x4HD please see the new photo on
the support page for correct input and output cable connections.
- 7 September 2016
LX-Store - Store for LXmini, LXmini+2, LXstudio and LX521.4 loudspeaker products
- 17 August 2016
If you are using the miniDSP 4x10HD for the LXmini, LXmini+2, LXstudio or
LX521.4 loudspeakers,
then check your LX-Support-Page for the latest update.
-
14 August 2016
My conversations with Fitz -
Acoustics and Mechanics
- 8 August 2016
Publications -
STEREO - From live to recorded and reproduced - What does it take?
- 8
August 2016
My conversations with Fitz -
Hearing - Part 2
- 3 August 2016
My conversations with Fitz -
Perception
- 26 July 2016
My conversations with Fitz -
Reality and Meaning
- 23 July 2016
My conversations with Fitz -
Me and the Planet
- 19 July 2016
My conversations with Fitz -
..... come into my parlor said the spider .....
The Creation
I sidetracked for a while as I was
trying to explain Hearing and the Association Model of Hearing in pictures
and got into the concepts of 'Gestalt generation' and 'Gestalt recognition'.
I will get back to Acoustics and Hearing soon.
- 14 July 2016
Other designs -
The Beanstalk CJK loudspeaker
- 30 June 2016
Links
- A Meta-Analysis of High Resolution Audio - Perceptual
Evaluation
26 June 2016
But first you want to
experience LXmini or LX521 ??
- 25 June 2016
My conversations
with Fitz - Our conversation continues. It's
all about "acoustic size"
- 21 June 2016
About me -
Coverage of Audio Artistry Vivaldi, Dvorak and Beethoven loudspeakers
in the The Audio Adventure magazine from some 20 years ago
- 20 June 2016
HOME - I cleaned up the HOME page
for fast access to essential topics
- 19 June 2016
Terms &
Conditions - I have added item 6) about
selling loudspeakers, which are clearly inspired by a Linkwitz Lab
design
- 15 June 2016
Your own design - My
conversations with Fitz
- 23 May 2016
Music - Anouar Brahem and Mason
Bates, beautiful and interesting music and sounds I recently listened to
- 1 May 2016
LX521.4 owners might check update 11).
It's what I am listening to these days
- 25 April 2016
Links - ECMA-407
and Telecommunications in the 21st Century
- 25 April 2016
Links - Reverberation
...and how to remove it
- 21 April 2016
LXmini+2 - Construction
Plans are now available
- 19 April 2016
OPEN HOUSE - Saturday & Sunday,
May 14 & 15, 2016, between 10:00 am and 5 pm.
You are invited to come to The
Sea Ranch, CA and
listen to my LXmini and LX521.4 loudspeakers as set up in our Sea
Pine Cottage.
Also meet Nelson Pass
- my neighbor and friend - who will be present.
Send me an email
with names, day and time of visit and to receive directions to our house.
Since The Sea Ranch is a 3 hour drive from San Francisco you may want to
stay overnight and make a beautiful weekend vacation out of this trip. Check with VRBO
or VacationHomes
for renting a house at Sea Ranch. The small town of Gualala at the
north end of Sea Ranch has motels, restaurants, shops and what else one might
need for a vacation. The closest large town is Santa
Rosa, about a two hour drive away.
- 14 April 2016
LXmini - Gallery - LXmini
Speaker Build from Kit
- 12 April 2016
Links - Floyd Toole: Room
reflections and Human Adaptation for Small Room Acoustics
- 4
April 2016
 |
OPEN HOUSE - Sunday, April 17th, 2016, between 10:00 am and 4 pm.
You are invited to come to our home in Corte Madera, CA and
listen to LXmini, LX521.4 or LXstudio loudspeakers. Hear the new LXmini+2,
a refinement of the LXmini by the addition of compact dipole
subwoofers.
Meet Dr. Frank Brenner from
www.LINKWITZ.store
who will be visiting on his layover day between flights from Frankfurt to
San Francisco and back to Frankfurt as the captain of a Lufthansa A380. This
is a rare opportunity to meet him.
Send me an email for number
of place reservations at either 10:00 am, 11:30 am, 1:00 pm, or 2:30 pm and
for directions to our house.
Get your Taxes done by April 16th and enjoy the freedom!
|
- 29 March 2016
Loudspeakers - Loudspeaker
system design - This page was no longer accessible after I had
rearranged pages some time ago.
The presented material is fundamental and educational, like a
"Loudspeakers 101" course.
- 25 March 2016
Amplifiers
etc - Amplifier distortion, amplifier and/or driver limited SPL,
speaker cables & interconnects
- 17 March 2016
Links - The
Universal Sense - How Hearing Shapes The Mind
- 11
March 2016
Audio
production - Streaming DSD files
- 5
March 2016
My Daughter the
Jeweler - Surprise someone you love with a little gift!
- 2 March 2016
Other
designs - Mellow Acoustics combined a smaller ESL63 like top with a
dynamic woofer
- 2 March 2016
The Sea Ranch - The
remodeled Sea Pine Cottage is our second home. LXmini and LX521.4 play here
to my fullest satisfaction. Look at my setup and associated equipment.
- 24 February 2016
about me - The UK audio magazine Hi-Fi
News & Record Review reports on me and my work for rendering sound
scenes in their March 2016 issue:
- 24 February 2016
Links - Optimizing the
directivity index of a 2-way loudspeaker
- 21
February 2016
magicLX521
- Dr. Frank Brenner's comments about our Open House yesterday. I will
have such event again in the future. |
"A unique
opportunity to listen to LXmini, LXstudio and LX521, presented by the
designer himself.... and to experience Eike and Siegfried Linkwitz`
overwhelming hospitality.
The interested audience got familiar to
the design priciples of these outstanding loudspeaker system. Time for
discussion and questions . And of course time to hear these
unconventional loudspeakers perform, fascinating the audience with
their stable, live-like illusion of musical performance, that does n o
t collapse when leaving the "sweet spot". Visitors could
convince themselves by wandering around in the room: The phantom
imaging remains stable, no matter where you listen from.
No Room correction at work, no fancy
room treatment, no boutique cables. But intelligent engineering and a
huge wealth of experience allowed the design of these transducers,
that work so well with the room.
All rounded up by Eike's fantastic
catering (home-made Brownies and more). Thank you!
Highly recommended, try to get a ticket
for a possible future session!" |
- 11 February 2016
Links - Acoustic power
radiation from loudspeaker cabinets
- 10 February 2016
Amplifiers
- PLUTO amplifiers for LXmini
- 21 January 2016
OPEN HOUSE - You are invited to come to our home in Corte Madera, CA and
listen to LXmini, LX521.4 or LXstudio loudspeakers on
Saturday, February 20th, 2016, between 10:00 am and 4 pm.
Meet Dr. Frank Brenner from
www.LINKWITZ.store
who will be visiting on his layover day between flights from Frankfurt to
San Francisco and back to Frankfurt as the captain of a Lufthansa A380. This
is a rare opportunity to meet him.
Send me an email for number
of place reservations at either 10:00 am, 11:30 am, 1:00 pm, or 2:30 pm and directions to our house.
- 7 January 2016
Links - Psychoacoustically
based 3D recording techniques on the revised Hauptmikrofon.de website
- 20 December 2015
Links - Rationalism versus
Empirism
- 10 December 2015
OPEN HOUSE - You are invited to come to our home in Corte Madera, CA and
listen to LXmini, LX521.4 or LXstudio loudspeakers on
Saturday, January 23rd, 2016, between 10:30 am and 6 pm. Bring along who
needs to be pleased.
Send me a note for number
of place reservations at either 10:30 am, 12:00 noon, 1:30 pm, 3:00 pm, or
4:30 pm and directions to our house.
All filled up.
- 10 December 2015
The Magic in 2-Channel Sound
- Comments by James Heddle
- 7 December 2015
My Daughter the Jeweler
- Have a look!
- 22 November 2015
Peter Barnett Memorial Award
- I received it at the IOA Conference on REPRODUCED SOUND 2015 in the UK
- 21 November 2015
The Magic in 2-Channel Sound
- John Watkinson talks about "The Importance of
Directivity in Loudspeakers"
- 19 November 2015
The Magic in 2-Channel Sound
- My paper with the title "The Magic in 2-Channel Sound Reproduction - Why is it so rarely heard?"
from the IOA Conference on REPRODUCED
SOUND 2015 in the UK.
- 31 October 2015
Coming up November 10th is the IOA Conference on REPRODUCED
SOUND 2015. I will give a talk and paper with the title:
The Magic in 2-Channel Sound Reproduction - Why is it so rarely heard?
- 25 October 2015
Other designs - BeoLab
90 with DSP controlled and adjustable directivity
- 20 October 2015
Links - Music Theory & MIDI Encoding
- 19 October 2015
NOTE - The mailbox at is 100% full. I am trying to resolve that problem.
- 19 October 2015
 |
- "In
Linkwitz' room, you don't feel listening to loudspeakers, but to
a musical performance" -
Lyman Miller (center), former HP colleague, audio projects
collaborator, and involved with music recording at Stanford University
and other places. More photos here. |
- 12 October 2015
LX521 Supplies - PowerBox
4180 and PowerBox 4400 pro from LINKWITZ.store for LXmini,
LXstudio and LX521.4
- 12 October 2015
LX521 Supplies - A
reworked ASP pcb for 3-way LX521 construction will be offered by "makonats"
- 12 October 2015
Links - Jeff Hawkins of Numenta
gives a fascinating talk about pattern recognition in the brain in response
to changing sensory input data streams.
- 12 October 2015
An article about Linkwitz-Lautsprecher
written by Schoeps Microphone Technical Director Joerg Wuttke (ret.) will be
published in "Das Musikmagazin für Ärzte, tonart
4 | 2015", which is an insert to the Gerrman Ärzteblatt.
- 10 October 2015
Burning
Amp 2015 on Saturday, October 17th, in Redwood City, CA. See diyAudio
for schedule and exhibitors.
I plan to demo the LXmini and LXstudio with the PowerBox from
LINKWITZ.store.
Dr. Frank Brenner, designer of the PowerBox, is scheduled to pilot a Lufthansa A380 from
Frankfurt to SFO the day before
and will be present on his layover day.
- 6 October 2015
Rocky
Mountain Audio Fest, Denver, CO, October 2-4
 |
| Time to pack
up! - A big THANK YOU to Adam and Brian from Madisound,
to John, Olav, Claus and Grete from SEAS
for their help in making Room 514 such an attraction. Thank
you to Don
for taking over the demo's to give me lunch breaks and to Brian L and
Jeff B from the OPLUG
for running a Q&A session about DIY construction of speakers.
Thank you to my wife Eike who paid attention, support and loving help
in many situations, accommodated our visitors and circulated about 600
Show Times Tickets.
She also took pictures, more of which are on
this page. |
- 29 September 2015
Rocky
Mountain Audio Fest, Denver, CO, October 2-4
Download the Show
Times for LXmini & LX521.4 and a List
of demo equipment with prices
used in Room 514 by LINKWITZ LAB with Madisound and SEAS.
- 28 September 2015
Rocky
Mountain Audio Fest, Denver, CO, October 2-4
If this weekend's demo has you interested in building your
own pair of LX521s or LXminis but want to know:
- how to integrate this into your existing system
- what is involved in building / what skills are needed
- how to get started
- where to get the components you need
- how to get answers when you run into problems
- what NOT to do...
Join us for an informal question-and-answer with several members of the
oplug-support.org forum.
Learn from those who have "been there - done that". BrianL
Saturday, 5 pm to 6 pm, Room 514, LINKWITZ LAB
- 8 September 2015
NOTE - The mailbox is 100% full. I am trying to resolve that problem.
- 8 September 2015
www.LINKWITZ.store
- LXmini prototype with 3D-printed woofer basket and top section
- 8 September 2015
Advertisement by
www.LINKWITZ.store
in: Das Musikmagazin für Ärzte, tonart
3 | 2015 , an insert to the Gerrman Ärzteblatt.
- 24 August
2015
Links - Nelson Pass talks about power
amplifiers
- 21 July 2015
It is not too soon to think about attending an interesting audio event later
this year
- October 2-4, Rocky
Mountain Audio Fest, Denver, CO.
With support from Madisound
and SEAS I plan to demo the
LXmini and LX521.4 in Room 514
using two Emotiva XPA5 amps and a miniDSP 4x10 Hd.
- October 17th, Burning
Amp 2015, Redwood City, CA, diyAudio
I plan to demo the LXmini and LXstudio with the PowerBox from
LINKWITZ.store.
Dr. Frank Brenner is scheduled to pilot a Lufthansa A380 from
Frankfurt to SFO the day before
and will be present on his layover day.
- November 10-12, Institute
of Acoustics - REPRODUCED SOUND
2015, Moreton-In-Marsh, UK.
I plan to talk about "The Magic in 2-Channel Sound Reproduction
- Why is it so rarely heard?"
- After that, November 23rd, my 80th Birthday,
and Thanksgiving with family
- 8
July 2015
Links - 24/196 Music Downloads ... and
why they make no sense
- 5 July 2015
Links - "The Audio Critic" and Peter
Aczel's "Audio Legacy"
- 9 June 2015
|
I just spent several hours listening
to the LXmini when driven by the first production sample of the
PowerBox
from magicLX521. Together with Dr. Frank Brenner, and an Academy
Awards nominated audio producer, we three compared the Hypex DSP and
UcD amplifier based PowerBox in my listening room to my typical LXmini
setup with miniDSP 4x10 Hd and AT1806 amplifiers. I am just astounded
how much more is in the LXmini system in terms of low end definition
and overall refinement of sound when connected to the PowerBox. We all
heard the remarkable ease, openness and neutrality. And I had thought
all along that I had a pretty decent setup and that it would be
difficult to get even more out of the LXmini! While I can still
proudly demo and listen to my LXmini
system even with the miniDSP 2x4 and Emotiva amps, it is difficult to
forget this comparison session. |
- 8 June 2015
The Sea Ranch - Here are
photos that will bring back memories to some of you from a time when we
rented our two cottages,
1990 to 2011, and you could audition ORION in one and PLUTO in the
other.
- 3 June 2015
LXmini - Wood Artistry builds
LXmini
- 3 June 2015
Please note that I will be out of email reach from June 12 to July 1 and
cannot respond to documentation requests
- 3 June 2015
Links - Floyd Toole lectures about Sound
Reproduction
- 1 June 2015
LX521.4 - The LX521.4 Construction Documentation is
now accessible to owners and buyers of LX521 documentation
- 29 May 2015
Other designs - Kii Audio
THREE cardioid loudspeaker
- 21 May 2015
Links - Do you know your PSA? - Singing the
Prostate Cancer Blues -
- 20
May 2015
Other designs - JBL M2
Master Reference Monitor
- 13 May 2015
LX521 - Examples of power
amplifier IM distortion at 1 W and below
- 10 May 2015
Links - DIY power amplifiers with
extremely low distortion
- 6 May 2015
LXstudio - The LXstudio Construction Plans
are now available
- 28 April 2015
Links - Mono to Stereo Upmixing
- 23 April 2015
Madisound will exhibit the LXmini at AXPONA
in Chicago, April 24-26, Room 302
- 24 February 2015
Links - WIZARDS OF SOUND - THE NEW YORKER
writes about the Meyer Sound Constellation Acoustic System and the San
Francisco Symphony SOUND BOX.
- 23 February 2015
Other designs -
Commercial designs: Fullrange cardioid speaker by Dutch & Dutch
- 17 February 2015
Other designs - DIY
Designs: Cardioid as sum of monopole and dipole speakers
- 13 February 2015
Links - The High Resolution Audibility
Test
- 1 February 2015
Links - Ken C. Pohlmann, Principles of
Digital Audio
- 1 February 2015
Links - J. Blauert, Communication Acoustics
- 15 January 2015
Links
- Experts ask the Experts about Sound Recording
and Sound Reproduction
 |
To me one of the most
significant events at the Rocky Mountain Audio Fest 2014 was the "Experts
ask the Experts" exchange of viewpoints regarding sound recording and sound
reproduction.
The discussion was honest and enlightening to both experts and
audience. The explanations could help audiophiles to understand some
of the limitations involved in recording and reproduction, and to
appreciate the work done and to make educated choices.
|
- 8 January 2015
Stereo Recording & Rendering 101
- Definition of processes
Happy New Year 2015
to all LINKWITZ LAB speaker builders, past, present and future!
In
2015 I plan to extend the LX speaker family from the analog LX521 and the
digital LXmini by adding three new members: LXstudio, LX521.3 and LX521.4.
This will provide an upgrade path for LXmini builders to LX521 levels and
be a revisit of the LX521 using DSP for equalization and crossovers.
For
the LXstudio I add to the LXmini pair the two open-baffle woofers of the LX521 and
use the miniDSP 4x10Hd for xo/eq. A prototype is already running and
impresses me with its fast dynamics, 3D rendering and expected extension
of bass. The 4-piece system provides greater flexibility in room placement
than the LX521.
For
the LX521.3 and LX521.4 systems I plan to start out from acoustic
measurements again, expecting more options in driver equalization from a
DSP unit than was practical with the ASP. The LX521.3 will be a 3-way
active system including the existing passive crossover, while the LX521.4
will be a 4-way active system and require an additional pair of power
amplifiers.
Those
are my plans. Let's hear what materializes.
Spread
the word to your friends:
Highly realistic 3D sound reproduction from stereo is also possible in
their rooms and is within their reach!
Spread the fun! |
- 14 December 2014
Links - ECMA-407: A New 3D
audio codec implementation up to NHK 22.2 with RVC-CAL
- 13 December 2014
Links - SOUND BOX with Meyer Sound
Constellation Acoustic System
- 10 December 2014
Pluto Ultimate
Stereo - All-in-One Reference Quality Omni Speaker System & Wireless
24/96 HD Audio Player
(Website under construction)
- 26 November 2014
A Retrospective - 15 Years of
www.linkwitzlab.com
- 21 November 2014
Issues in speaker design - Woofer
equalization in LXmini
- 7
November 2014
Links - Spatial Audio: Reconstructing
Reality or Creating Illusion? |
- 27
October 2014
- Rocky Mountain Audio Fest 2014
 |
 |
 |
Sound demonstrations
of the LX521 and LXmini at the ROCKY MOUNTAIN
AUDIO FEST in Room 418 alternated between speakers every hour and drew
great acclaim for the naturalness of presentations. The speakers
generated much interest for the LX521 and LXmini DIY materials and
driver kits, which were shown in adjacent Room 417 by Madisound and
SEAS.
The AudioTraveler - RMAF
2014: Madisound and the paradise that awaits
Enjoy the Music.com - RMAF
2014: Madisound Speaker Components
We had many visitors come back repeatedly for
listening to more music or to bring their friends to share the
experience. The LXmini created lots of astonishment and excitement. It
put a smile on many a face. The LX521 impressed with resolution and
dynamic range from delicate to raw power.
stereophile - RMAF
2014: Reichert on Sunday
OPLUG - RMAF 2014 Linkwitz
Lab Show Report? |
|
One of the most
significant events at the show was the "Experts
ask the Experts" exchange of viewpoints regarding sound recording and sound
reproduction. The discussion was honest and enlightening to both experts and
audience. It was recorded and I hope it will be published soon and
without edits, helping audiophiles to understand the issues, to
appreciate the work and to make educated choices.
stereophile report: RMAF
2014: Music & Seminars |
| - Tsunoda Naotaka, Sony
Headphones - Siegfried Linkwitz - Peter Mcgrath, Wilson Audio -
Richard Schram, Parasound - Cookie Marenco, Blue Coast Records - Jack
Vad, San Francisco Symphony Recordings producer/engineer - |
- 16 October 2014
- 14 October 2014
Links -
"A call for an open source loudspeaker project"
- 2 October 2014
LX521 - Stereo sound system
configuration
- 30 September 2014
ROCKY
MOUNTAIN AUDIO FEST - "Experts ask the Experts" - This should
be an interesting exchange of viewpoints regarding sound recording and sound
reproduction
- 22 September 2014
LXmini - A reference
quality stereo sound system
- 17 September 2014
Links - Ecma publishes the world’s first 3D audio standard
- 3 September 2014
LXmini - Digital Stereo Sound System
- 24 August 2014
ROCKY MOUNTAIN
AUDIO FEST - October 10-12, 2014 - Madisound-SEAS-Linkwitz Lab - Room
417 & 418
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I will be there with the
amazing LX521 and the new LXmini Reference Loudspeakers and
demonstrate them in Room 418 each day of the show.
LX521 at 9 am, 11 am, 1 pm, 3 pm, 5 pm
LXmini at 10 am, 12 am, 2 pm, 4 pm
It is time to make your travel arrangements to the
Denver Tech Center, if you have not done so already.
The sound you hear in Room 418 should be your
reference for the show. |
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- 20 August 2014
Links - ECMA-407,
the world’s first 3D audio standard is coming
- 15 August 2014
LXmini - Amplifier and Gallery pages
added
- 8 August 2014
Sound recordings - West Side Story,
San Francisco Symphony
- 26 July 2014
Links - The Distortion of Sound
- 14
July 2014
LXmini - Construction Plans released
- 9 July 2014
Links - SOUND AND RECORDING - Applications
and Theory, written by Francis Rumsey and Tim McCormick
- 7 July 2014
Links - We need to talk about SPEAKERS ...
- 5 July 2014
Links - Floyd Toole is "Reflecting
on Reflections" in the June 2014 issue of the JAES
- 3 July 2014
Links - Berliner Philharmoniker in the
Digital Concert Hall - A great musical and visual treasure!
- 24 June 2014
LXmini - A new, small speaker with the
promise of producing Reference Quality Sound in any size room
- 21 May 2014
Loudspeaker & Room
- Test and measurement of loudspeaker and room interaction
- 21 May 2014
Sound recordings - Discover Internet Radio
broadcasts
- 28 April 2014
LX521 - Sound as close to Live - as the
Recording provides!
www.magicLX521
(now LINKWITZ.store)
offers the fully assembled
and finished LX521 at promotional prices
during their Titanium Driver Award
campaign.
- 8 April 2014
The Audio Critic
- Peter Aczel reviews the LX521 Reference Loudspeaker
- 1 April 2014
Ping Tests - WATSON loudspeakers
outdoors of SPC
- 28 March 2014
Links - Line array dipole for a Concert
Hall sound system
- 26 March 2014
Links - Fundamentals of sampled
signals, DAC's and the reconstruction into analog signals are illustrated in
an Agilent Application Note
- 24 March 2014
Dipole prototypes - Public Address column loudspeaker
- 19 March 2014
Ping
Tests - Experiments to understand what matters to the creation of a 3D
auditory phantom scene from two loudspeakers and in different rooms
- 8 March 2014
diyAudio
- "Extreme Open Baffle Active Speaker inspired by Linkwitz LX521"
- 23 February 2014
www.6moons.com
- Review of Chinese-built Pluto Ultimate, which is now available from www.plutospeakers.co.uk
in the UK
- 23 February 2014
www.hifiwigwam.com - Review of Chinese-built Pluto Ultimate,
which is now available from www.plutospeakers.co.uk in the UK
- 2 February 2014
LX521 Photos & Comments
- Ein Hör-Erlebnis in Stuttgart
- 16 January 2014
Links - "SAVE THE STEREO"
and "Pure Audio to Health"
- 12 January 2014
About me - "The Titanium Driver Award"
from ALMA International
- 8 January 2014
Loudspeakers - "Whatever happened to
the quality of reproduced sound in the home?"
- 29 December 2013
My current setup - Audio/Video in our home on
the Pacific Coast
- 6 December 2013
NUTSHELL HIGH FIDELITY - A most interesting
website
- 3 December 2013
Pluto
Ultimate - Reviewed by "Hifi Pig"
- 27 November 2013
LX521 - Listening room with
rear wall reflections
- 20 November 2013
ALMA International - 2014 Winter Symposium - I will talk
about: "Whatever happened to the quality of reproduced sound in the
home?"
- 17 November 2013
PLUTO - Photos of Chinese market PLUTO
System
- 27 October 2013
Construction Plans for LX521,
ORION and PLUTO can be sent as PDF
- 23 October 2013
stereophile
completed its report on RMAF-2013.
The LX521 was not mentioned, though the reporter assigned to the floor was
in our room, listened to his CDs, took notes and visibly enjoyed what he
heard. I must assume that stereophile did not consider the LX521 to be of
interest or educational value to their readership. Frequency independent directivity for minimum perceptual interaction with the
room is found in hardly any commercial loudspeaker design, as can be seen in
the photos from the show. Our demo gave immediately recognizable proof of
its benefits. The LX521 sends a message
to the loudspeaker industry, a message that would be inconvenient to
stereophile's top advertisers.
If there were fewer visitors to RMAF, we would not have known. Our room was
packed almost all the time and many music lovers returned for more, enjoying
the clarity, timbre, dynamics and spatial rendering, and thus the
believability of the auditory illusion.
ULTRA HIGH-END surprisingly includes
the LX521 in its coverage of RMAF. The reviewer apparently failed to
recognize the significance of the design in comparison to every other
loudspeaker at the show. Our emptied out hotel bedroom had no acoustic
treatment. But what is "ultra high-end" all about? In this
category of audio the price of the equipment usually far exceeds any
realistic gain in performance. Who is the audience? I want to satisfy
individuals who are still familiar with live (unamplified) sounds in a
performance space, or who play an instrument, or make recordings. It ought
to and can be done in such a way, that many can afford the pleasure of
hearing great recordings convincingly rendered in a normal living
room.
Confessions of a Part-Time AUDIOPHILE gives an
informative report. But the quoted prices are per pair, not per side, and so
the total for a Madisound supplied LX521 Kit plus the prerequisite Linkwitz
Lab Construction Plans comes to around
$3200. Handout
- 20 October 2013
Assemblies - A listing of sources for full
assemblies and subassemblies of LX521, ORION and PLUTO loudspeakers
- 16 October 2013
Links - International
Conference on Spatial Audio
- 15 October 2013
Rocky Mountain Audio Fest
- 2013, Oct. 11-13 ------- Handout
I gave 10 minute talks about
*** Stereo is a Magic Trick *** in room 418
Friday: 2 pm, 5 pm and Saturday: 11 am, 2 pm, 5 pm and Sunday: 11 am, 2 pm
 |
RMAF brought over 400
visitors to our room giving them an auditory experience and appreciation of
stereo they never could have had before the advent of the LX521. I surprised myself
several times about the speaker's bass output capabilities when hearing new material that visitors brought.
We shocked more than one well known loudspeaker designer by the
transparency, clarity and dynamics of close to live-like sounds produced
by these speakers, and by the believability of an auditory scene
devoid of loudspeakers. It was a most enjoyable magic trick, people got
lost in the music and many
listeners came back to our room for more. As one person wrote to me
afterwards: "Your room at the show was 'Hotel California' - the
room where people kept entering but never left."
The speakers were assembled from a Madisound
flat-pack of wood parts. We used the Madisound assembled and tested ASP.
The 12 drivers are all SEAS designs and Olav Arntzen,
R&D manager at the time, was more than pleased to hear what his products allowed
me to develop. John Stone, US representative of SEAS, played an
important role by leaning on R&D for accomplishing certain driver
modifications that were needed in open baffle applications.
We used a BelCanto (CD2) CD player with built-in preamp
and volume control to drive the ASP. Connected to it were two Emotiva (XPA-5) 5-channel amps with 200W/channel output, driving bottom and top woofers
separately, midranges and tweeters with 4 channels per side. |
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- 15 October 2013
Videos taken by Linear Integrated Systems at the Burning
Amp Festival - 2013 (The audio is severely clipped in my talk)
stereophile reports a slow burn at 12 noon, but attendance was merely 10% down
by the end of the day compared to last year.
From left, Juha Backmann (Nokia)
thanks the invited speakers:
Axel Grell (Sennheiser), Siegfried
Linkwitz, and Ilpo Martikainen (Genelec)
- 1 August 2013
AES
51st Conference - "Loudspeakers and Headphones", Helsinki,
Finland, 21-24 August, 2013
- 27 July 2013
LX521 Supplies - What do you need?
- 27 July 2013
PLUTO-2.1 System - It will be announced
to Chinese audiophiles on 28 July 2013 by HIFIDIY.NET
with Pluto advertisement at https://bbs.hifidiy.net/forum.php
- 23 July 2013
LX521 Supplies - Assembled DSP and
LX521 Configuration File
- 3 July 2013
Home - From where and in what numbers do
visitors come to this website?
- 1 July 2013
LX521 Description - An updated spreadsheet to
find the optimum toe-in angle and an analysis of reflection delay and
attenuation for dipole and monopole sources in different size rooms
- 1 July 2013
Stereo Recording and Rendering -
Sound Field Control for Rendering Stereo - 1
- 29 June 2013
Audio production - An
interview with Keith O. Johnson of Reference Recordings
- 29 June 2013
LX521 DSP challenge - A complete DSP solution
with digital and analog interfaces
- 26 June 2013
LX521 Description - A spreadsheet to
find the optimum toe-in angle and an analysis of reflection delay
- 25 June 2013
LX521 DSP challenge - Digital
Crossover/EQ with Open-Source Software: HOWTO
- 25 June 2013
Links - Introduction to Sound
Recording
- 22 June 2013
LX521 Photos - Different implementations of the speakers
- 16 June 2013
Recording and
Rendering - Sound Field Control for Rendering Stereo - 2
- 14 June 2013
LX521 Supplies - Madisound now offers the assembled and
tested Analog Signal Processor
- 7 June 2013
LX521
Description
- The Listening Room
- 5 June 2013
Other designs -
Dipole polar response. Synergy Horn from a distance
- 29 May 2013
Links - Bruno Putzeys on
Amplifiers and Class D
- 26 May 2013
Links - Boyk on Piano
- 26 May 2013
ORION-5 - A source in the UK to hear and buy the
complete loudspeaker system
- 22 May 2013
Publications - Papers to be presented at
the AES 51st and AES 52nd International Conference
- 6 May 2013
LX521 monitor - Madisound
now ships Flat Pack Cabinets
- 4 May 2013
Issues in speaker design -
Further thoughts about "Group delay and transient response"
- 19 April 2013
DSP challenge -
We have an efficient solution for LX521 stereo setups
- 13 April 2013
Audio production - San
Francisco Symphony - Channel Classics - McGill
University - Pentatone Classics - DGG
- 8 April 2013
DSP challenge - updated
- 7 April 2013
Links - Linear Audio publications and Jan
Didden's personal website
- 4 April 2013
DSP challenge - One possible
alternative to the LX521 ASP
- 29 March 2013
Links - Evaluation of Time-Frequency
Analysis Methods and their Practical Application
- 28 March 2013
Links - KLIPPEL - Online Training
- 24 March 2013
Publications - Updated links
- 23 March 2013
LX521 - Assembling Top baffle,
Woofer baffle and Bridge
- 23 March 2013
LX-521 - Designing a DSP based
equalizer/crossover
- 21 March 2013
ORION-4 - Reports from AXPONA 2013 in Chicago
- 10 March 2010
Design Models - Point dipole and point monopole
in a circular baffle
- 4 March 2013
Stereo Recording and
Rendering - Recording in a virtual acoustic space
- 25 February 2013
LX521 supplies - Promotional offer for
cabinets from MagicLX521 opening its store
- 30 January 2013
Links - MUSIC TO YOUR EARS, a
most interesting article in the current issue of THE NEW YORKER
- 21 January 2013
LX521 supplies - Cabinet Kit
from Germany
- 15 January 2013
LX521 monitor - Photos & Comments
about the LX521
- 10 January 2013
Digital Photo Processes - Five years
later
- 9 January 2013
ORION challenge - Peter Aczel of
The Audio Critic describes 'The Final Mod: Orion 3.3.1SN'
- 8 January 2013
LX521 monitor - The first pairs are
playing in Germany and USA
- 8 January 2013
Links - Dynamic Space
Stereophony
- 5 January 2013
Sound Recordings - I added some of my favorite music
videos to the list
- 2 January 2013
Stereo Recording and Rendering
- Subjective evaluation of phantom acoustic scenes
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