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Dynaco-Doctor Forum Welcome! Need support, you got it. Or share your ideas and experiences. |
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Dynaco-Doctor Forum Welcome! Need support, you got it. Or share your ideas and experiences. |
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In Reply to: RE: Dynaco Quadraphonic Simulator Circuit posted by ARnut on February 27, 2011 at 19:27:56:
To do this at line level requires aome sort of phase inverter to derive the L-R and R-L signals. Take a look at sound.westhost.com, project #18, a good discussion showing a passive circuit using a transformer (expensive & hard to find) and an active circuit using op-amps. If you don't want center channel or sub-woofer outputs, you can leave that op-amp out. Might be nice to put a gain control at the rear output - 10K would be a reasonable value. Also, this circuit gives you L-R only, so to duplicate the effect of the 'Hafler circuit' shown in Fig 1, you could reverse the polarity of the right rear speaker. Not sure you'd hear much difference - try it!
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