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| Build-Your-Own | Main Panel | Dipole Woofer | Crossover/EQ | Supplies |
| System Test | Design Models | Prototypes | Active Filters | Surround | FAQ |

 

Printed Circuit Board
and PHOENIX Construction Plans+

Use of a printed circuit board greatly simplifies the construction of the electronics for the PHOENIX or the addition of a dipole woofer to an existing system (FAQ10, 15). Stuffing the leads of the components through the correct holes of the board is made easy by having a silk screened designation for each circuit element and a corresponding match with the parts list. You solder the leads to pre-tinned pads on the backside of the board. The board is then fully functional since input and output connectors are mounted on the board.

All this saves you a major amount of time - even when it takes about 4 hours to fully load and solder one board - over constructing your own point-to-point wired electronics or designing your own printed circuit board. 
And while it helps you with building an exceptional loudspeaker system, selling the printed circuit board gives me some compensation for development expenses, for the extensive information that I provide you with and keeps the pages free of flashing advertisements to pay for the site. 


ORION-ASP, MT1 and WM1 printed circuit boards

The latest version of my printed circuit boards is the ORION Analog Signal Processor. It is a universal circuit topology for building a wide range of 3-way crossover/equalizers. It is used for PHOENIX and ORION but also available for your own speaker development, be it dipole or box.

 

PHOENIX Construction Plans+ 

The PHOENIX speaker system was introduced in 2001. Its construction and the design philosophy behind it is fully described in the pages of my website. The construction plans are newly revised and incorporate the changes that have occurred for various reasons. I now recommend the Peerless 12" XLS driver, 830500, for the dipole woofers and a 24 dB/oct crossover between woofer and midrange. Midrange and tweeter choices continue to be the Scan Speak 21W/8554 and D2905/9700 drivers. If you want to use different drivers, then the ASP is flexible enough to accommodate them. Any necessary filter circuit changes are up to you and I cannot give you specific help over what you can find on this website and on my Archive CD.

The PHOENIX documentation provides:

  • Schematic of Crossover/EQ circuit. All component values and circuit designations.
  • Parts list with order numbers for Digi-Key and Mouser
  • Printout of silk screen for parts location
  • Main panel drawings and assembly description
  • Dipole woofer drawing
  • ASP description and assembly notes
  • Frequency response of ASP
  • Circuit board test and speaker test notes

The ORION ASP printed circuit board that is used for the PHOENIX project has the following features :

  • Woofer, mid, and tweeter equalization circuitry for a single channel with dc supply filtering
  • 8" wide along the connector side by 7" tall, 0.062" FR4
  • Top silk screen with component designations
  • 2 layer pcb with top layer ground plane, 1 oz. Cu, 50 mil traces, plated through holes, solder mask top and bottom
  • DIN power connector and 4 RCA phono connectors
  • Connection pads for dc power to other boards, power indicating LED
  • Input RFI filter 
  • Tweeter and woofer 24 dB/oct crossover filters and equalization
  • Tweeter and midrange offset delay
  • Woofer shelving filter, Linkwitz Transform
  • DC supply filter

The two ASP printed circuit boards for a PHOENIX stereo system and its documentation are available for $190 plus shipping and PayPal fees. 

 

ORION ASP

You can purchase the ORION ASP printed circuit board by itself for your own 2-way or 3-way active loudspeaker project design. From the block diagram and its application to the ORION you should be able to tell the wide range of signal processors that can be built with it. The circuit board comes only with the documentation that is necessary for using it.

  • ASP block diagram
  • Circuit schematic with component designators, but without component values
  • Component layout on the circuit board

The circuit board is meant to simplify your own ASP assembly when you know how to design an active crossover/equalizer. I cannot provide you with more help than what you can find on my website Archive CD and the Active filters pages. Purchase the PHOENIX Construction Plans+ if you are learning to build active speakers.  

Two ORION ASP printed circuit boards are available for $100 plus shipping and PayPal fees.

 

WM1 printed circuit board

The WM1 printed circuit board allows the construction of a variety of active line-level filters for loudspeaker equalization. In particular, it provides dipole equalization and the Linkwitz Transform. For the design of the filters and to determine component values follow the outline given on the Active Filters page and on the Archive CD

The WM1 has the following features:

  • Circuitry for two channels
  • 4.2" wide along the connector side by 4.6" deep, 0.062" FR4
  • Top silk screen with component designations 
  • 2 layers, top layer ground plane, 1 oz. Cu, 50 mil traces, plated through holes, solder mask top and bottom
  • DIN power connector and 4 phono connectors (2-in, 2-out)
  • Connection pads for dc power to other boards
  • Weight 40 gram (1.5 oz)

The WM1 comes with the following documentation package:

  • General schematic with component designations
  • Printout of silk screen for parts location
  • Example circuit schematics with component values and designations
  • Parts list for one example with order numbers for Digi-Key and Mouser
  • +/-12 V power supply recommendation 

The WM1 is available for $30 plus shipping and PayPal fees

 

MT1 printed circuit board

The MT1 printed circuit board allows the construction of a variety of active line-level filters for loudspeaker equalization. In particular, it provides crossovers, baffle step and delay compensation for a 2-way active speaker. For the design of the filters and to determine component values follow the outline given on the Active Filters page and on the Archive CD

The MT1 has the following features:

  • Circuitry for two channels and dc supply filtering
  • 6.25" wide along the connector side by 4.6" deep, 0.062" FR4
  • Top silk screen with component designations 
  • 2 layers, top layer ground plane, 1 oz. Cu, 50 mil traces, plated through holes, solder mask top and bottom
  • DIN power connector and 6 phono connectors
  • Connection pads for dc power to other boards
  • Weight 70 gram (2.5 oz)

Both boards come with the following documentation package:

  • General schematic with component designations
  • Printout of silk screen for parts location
  • Example circuit schematics with component values and designations
  • Parts list for one example with order numbers for Digi-Key and Mouser
  • +/-12 V power supply recommendation

The MT1 is available for $40 plus shipping and PayPal fees  OBSOLETE

 

Ordering and payment information

You can pay with credit card over the Internet by using PayPal. In that case, please add a 3% payment fee (4% international) to the total cost of Kit and shipping. My address for PayPal is:  sl@linkwitzlab.com .

Alternatively you can purchase and send me a Postal Money Order, International Money Order, Western Union or Thomas Cook Money Order, or a Bank (cashier's) Check drawn in $USA currency and made out to Siegfried Linkwitz. I will wait with shipment against a personal check from a US bank until my bank has cleared it. A direct transfer of money from your bank to my bank account is not feasible due to unpredictable additional fees.

Send your payment to:

LINKWITZ LAB
15 Prospect Lane
Corte Madera, CA 94925
USA
sl@linkwitzlab.com (for PayPal)

The circuit boards are shipped via US Postal Service Priority Mail. Quoted delivery is 3 - 5 working days.

Send an e-mail message with the subject "Phoenix order" or "pcb order" to tell me the details of your order and to provide me with shipping information.
Copy the example below between the dashed lines into an e-mail message to sl@linkwitzlab.com and correct the underlined text . 
(Drag your mouse over the text to highlight it, then COPY and PASTE into your e-mail message) 

==========================================

Shipping Label:

John-Alexander Smith
345 Kensington Street
Apartment #54
New York, NY 10019
USA

Quantity of items:

PHOENIX Construction Plans ($90):    1
ORION ASP, new pcb* ($75):    2
WM1 pcb ($30):    obsolete
MT1 pcb ($40):     obsolete
Archive CD ($45)    0

* It is up to the DIY builder to generate a material list for the new pcb from the PHOENIX circuit diagram. The Phoenix project is no longer maintained by me.

Subtotal:    $240

California residents add 9% Sales Tax

Shipping ($10 US, $25 International)
PayPal fees (3% US, 4% international)

Total:  $250

PayPal / Money Order in the amount of:  $257.50
including shipment and fees sent on 23 October 2012 .

Note: All material is copyrighted and for the personal, non-commercial use by the person who bought it from LINKWITZ LAB. It may not be passed on in any form for use by others.

Comments:  Anything you want to tell me


==========================================

After I have received your e-mail instructions and PayPal / $USA Money Order I will promptly ship your parts. 

 

Contact me first, if you are considering commercial use of the printed circuit boards.

 

| Build-Your-Own | Main Panel | Dipole Woofer | Crossover/EQ | Supplies |
| System Test | Design Models | Prototypes | Active Filters | Surround | FAQ |

 

What you hear is not the air pressure variation in itself 
but what has drawn your attention
in the two streams of superimposed air pressure variations at your eardrums

An acoustic event has dimensions of Time, Tone, Loudness and Space
Have they been recorded and rendered sensibly?

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Last revised: 03/19/2014   -  1999-2014 LINKWITZ LAB, All Rights Reserved