Dynaco Quadraphonic Simulator Circuit

Dynaco-Doctor Forum

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A hundred years ago when I assembled my first Dynaco pre-amp, amps, and tuner, there was a product developed by David Haffler (don't remember exactly what it was called) that used a very simple circuit that fed a stereo source to rear amps and speakers for a simulated "surround" effect. It worked quite well on some vintage recordings.

There was another version that allowed 4 speakers to be connected to a single stereo amp (I believe it summed cannels A+B and fed them to the rear speakers).

Does anyone have schematics to share?

Thanks.

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Topic - Dynaco Quadraphonic Simulator Circuit - ARnut 15:15:27 02/26/11 (10)

RE: Dynaco Quadraphonic Simulator Circuit - teknofossil 18:46:14 03/23/11 (0)

RE: Dynaco Quadraphonic Simulator Circuit - scarlett5689@att.net 19:14:31 02/26/11 (8)

RE: Dynaco Quadraphonic Simulator Circuit - GP49 21:26:40 02/26/11 (7)

RE: Dynaco Quadraphonic Simulator Circuit - ARnut 19:27:56 02/27/11 (6)

RE: Dynaco Quadraphonic Simulator Circuit - teknofossil 19:20:00 03/23/11 (0)

RE: Dynaco Quadraphonic Simulator Circuit - scarlett5689@att.net 10:31:15 02/28/11 (4)

IIRC - CharleyW 19:48:02 02/28/11 (3)

RE: IIRC - GP49 21:23:51 02/28/11 (2)

RE: IIRC - ARnut 21:23:30 03/02/11 (1)

RE: IIRC - scarlett5689@att.net 17:32:33 03/03/11 (0)

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