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Passive Mixer

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Baldwin HiFi Modular Rotary Mixer Information.

I was commissioned to design a Rotary Volume Controlled Mixer to provide a Zone Control for many Power Amplifiers driven by 1 Mixing Desk Stereo Source for a new HiFi Venue in Ibiza.

Zone Control

3 circuit boards have been designed with Plug-in Ribbon Cable connectors.
They are all connected by ready made similar 6 way Molex plug-in ribbon cables available from RS.
The simple idea is to use a standard (un-powered) Input and Output circuit board with 2 x RCA Phono connecting Sockets. Board No 1 the Phono Board.
Each Interconnect Phono Board has decoupling capacitors on the positive in/out signal connectors. Common Ground is used within the scheme.

Phono Interconnect Board (1)
Interconnect Phono Board No 1
This Board includes a 200mm plug-in Molex Ribbon Cable.
InterConnect Volume Board (2)
Interconnect Volume Board
This Board includes a 100mm plug-in Molex Ribbon Cable.
A Sample
Interconnect Boards
A string of 2 Outputs and 1 Master - or it could be 2 Inputs and 1 Master Output!
These are connected by the plug-in ribbon connectors to the bank (as many as you like) of Volume Control Boards. Board No 2.

Each Volume Control Board (No 2) is interconnected by the same 6 way ribbon cables - a lattice of the Mixing Buss!
Each of these Volume Control Boards have electronic isolation (decoupling) so that a change to a particular level on one channel will not affect any of the other outputs or sources.
6mm Pot Shafts for standard grub screw knobs to fit (you cut the shafts to length). The potentiometers are 100K Logarithmic OMEG high quality enclosed units.

A similar volume control board (Board No 3) is used to act as the MASTER Volume Level Control (shown on the right above).
All of the boards are interlaced with the same 6 core Ribbon Cable plugs. (100mm length and 200mm length).

By this system - (in the following photos you will see a 7 way Output Control for 7 Stereo Amplifiers) - a 7 way Zone Control - you can use the boards and interconnects - both ways - ie: have many input sources mixed (shown below) or 1 input source to many outputs (as shown above).

No Hum or Hiss - a HiFi Rotary Mixing system - have as many ins/outs as you need.
The entire cascade only loses 1dB level throughout - no matter how many modules are in the chain.
A Passive Mixing system. No Power required!

The Modular system can also be used as a multi-Input Mixing Desk with Master Level Control.
Mixer Layout


Build it yourself, or we can Build it for you.

Here is the completed Ibiza 7 Channel Zone Control Unit. Custom case, custom engraving and CNC work.

Zone Control
Zone Control
Zone Control
Zone Control
Ready Built Units.

All units will have a Master Volume Control (and in/out 2 x Phono Sockets)- Case CNC Engraving included.
Prices below also include high quality solid Alloy Volume Knobs.

Carriage within the UK would be 20.00

a. 2 x Stereo Channel in/out: 310.00.

b. 3 x Stereo Channel in/out: 381.00.

c. 4 x Stereo Channel in/out: 452.00.

d. 5 x Stereo Channel in/out: 523.00.

e. 6 x Stereo Channel in/out: 594.00.

f. 7 x Stereo Channel in/out: 665.00.

e. 8 x Stereo Channel in/out: 736.00.

f. 9 x Stereo Channel in/out: 807.00.

Contact Paul to discuss what you need.


Warranty:

The ReelAudio Custom Built Baldwin HiFi Mixer Board systems are guaranteed for a period of 12 months from the date of purchase.
Normal Usage is implied by the word 'Guarantee' and 'Warranty'.

Click Here to view the Products & Pricing Page.

All Warranty repairs are undertaken on a return to base principle.
Any carriage costs are the responsibility of the Client

REELAUDIO MAKES NO WARRANTY, EITHER EXPRESS OR IMPLIED WITH RESPECT TO ANY PRODUCT, AND SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES, INCLUDING, WITHOUT LIMITATION, WARRANTIES FOR MERCHANTABILITY, NON-INFRINGEMENT AND FITNESS FOR ANY PARTICULAR PURPOSE. REELAUDIOS' SOLE OBLIGATION AND LIABILITY FOR PRODUCT DEFECTS SHALL BE, AT REELAUDIOS' OPTION, TO REPLACE SUCH DEFECTIVE PRODUCT OR REFUND TO BUYER THE AMOUNT PAID BY BUYER THEREFOR. IN NO EVENT SHALL REELAUDIOS' LIABILITY EXCEED THE BUYER'S PURCHASE PRICE. THE FOREGOING REMEDY SHALL BE SUBJECT TO BUYER'S WRITTEN NOTIFICATION OF DEFECT AND RETURN OF THE DEFECTIVE PRODUCT WITHIN NINETY (90) DAYS OF PURCHASE. THE FOREGOING REMEDY DOES NOT APPLY TO PRODUCTS THAT HAVE BEEN SUBJECTED TO MISUSE (INCLUDING WITHOUT LIMITATION STATIC DISCHARGE), NEGLECT, ACCIDENT OR MODIFICATION, OR TO PRODUCTS THAT HAVE BEEN SOLDERED OR ALTERED DURING ASSEMBLY, OR ARE OTHERWISE NOT CAPABLE OF BEING TESTED, OR IF DAMAGE OCCURS AS A RESULT OF THE FAILURE OF BUYER TO FOLLOW SPECIFIC INSTRUCTIONS.

IN NO EVENT SHALL REELAUDIO BE LIABLE TO THE BUYER OR TO ANY THIRD PARTY FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, PUNITIVE OR EXEMPLARY DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS, LOST SAVINGS, OR LOSS OF BUSINESS OPPORTUNITY) ARISING OUT OF OR RELATING TO ANY PRODUCT OR SERVICE PROVIDED OR TO BE PROVIDED BY REELAUDIO OR THE USE OR INABILITY TO USE THE SAME, EVEN IF REELAUDIO HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

Units are Designed and Hand Built by:
Paul Baldwin
www.ReelAudio.Co.UK
Founder: BaldwinHiFi.Co.UK
12 Tack Lee Road
Yapton
Arundel
West Sussex
BN18 0HB - UK - Great Britain

Direct EMAIL: neverfinished0@hotmail.com
EBay Customers: Please use this direct email with your questions - the Ebay email system is now amazingly unusuable
and history has shown that either one of us can get banned for asking or responding to technical questions.

Tel: 01243 553231 - Mobile: 07858 089421
Please note: Paul may be contacted by telephone during his preferred admin period of between 5pm and 8pm. Thankyou.

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