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Re: Using a BRIDGE RECTIFIER in an audio circuit

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On 30/03/2017 08:55, oldschool@tubes.com wrote:
> My object is to combine the right and left channel coming from the
> preamp into one combined mono channel. I want to do this so the preamp
> left and right channels remain separated as they are fed into a stereo
> power amp. -BUT- I want a combined mono channel to feed into another
> mono power amp to power a 3rd channel to be used as a subwoofer.
>
> I know that using capacitors will allow leakage from the left and right
> channels into each other, and cause a loss of stereo separation.

Either use an active mixer so that the signals see a virtual earth or if 
you want a passive only bodge then connect them together by an L+R+C 
divider with the capacitor across the input to the bass amp. You want a 
fairly steep low pass filter for the bass channel (there isn't usually a 
lot of directional information in the bass content to lose anyway).

Choosing component values to give eg. -6dB at 60Hz and ~50k loading.

> Resistors will help with the separation, but will cause a drop in output
> from the preamp. I know that using a single diode from each channel (t
> othe new center channel) will cause clipping, similar to the fuzz tone
> sound used with guitars.
>
> Then it occurred to me. A bridge rectifier will allow both the positive
> and negative halves of a wave to both pass thru, but not allow the
> signal to go backward.
>
> Will this work?

It will sound like a terrible frequency doubler on a pure sine wave and 
much worse on more complex signals.

-- 
Regards,
Martin Brown

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Thread

Using a BRIDGE RECTIFIER in an audio circuit oldschool@tubes.com - 2017-03-30 02:55 -0500
  Re: Using a BRIDGE RECTIFIER in an audio circuit Martin Brown <'''newspam'''@nezumi.demon.co.uk> - 2017-03-30 09:28 +0100
    Re: Using a BRIDGE RECTIFIER in an audio circuit oldschool@tubes.com - 2017-03-30 16:45 -0500
      Re: Using a BRIDGE RECTIFIER in an audio circuit rickman <gnuarm@gmail.com> - 2017-03-30 18:35 -0400
        Re: Using a BRIDGE RECTIFIER in an audio circuit M Philbrook <jamie_ka1lpa@charter.net> - 2017-03-30 19:54 -0500
          Re: Using a BRIDGE RECTIFIER in an audio circuit rickman <gnuarm@gmail.com> - 2017-03-30 23:58 -0400
          Re: Using a BRIDGE RECTIFIER in an audio circuit makolber@yahoo.com - 2017-04-04 08:30 -0700
            Re: Using a BRIDGE RECTIFIER in an audio circuit whit3rd <whit3rd@gmail.com> - 2017-04-08 15:05 -0700
  Re: Using a BRIDGE RECTIFIER in an audio circuit George Herold <gherold@teachspin.com> - 2017-03-30 06:04 -0700
  Re: Using a BRIDGE RECTIFIER in an audio circuit John Larkin <jjlarkin@highlandtechnology.com> - 2017-03-30 08:33 -0700
    Re: Using a BRIDGE RECTIFIER in an audio circuit bitrex <bitrex@de.lete.earthlink.net> - 2017-03-30 11:36 -0400
      Re: Using a BRIDGE RECTIFIER in an audio circuit oldschool@tubes.com - 2017-03-30 16:40 -0500
        Re: Using a BRIDGE RECTIFIER in an audio circuit rickman <gnuarm@gmail.com> - 2017-03-30 17:56 -0400
          Re: Using a BRIDGE RECTIFIER in an audio circuit "Michael A. Terrell" <mike.terrell@earthlink.net> - 2017-04-02 01:45 -0400
  Re: Using a BRIDGE RECTIFIER in an audio circuit Tim Wescott <seemywebsite@myfooter.really> - 2017-03-30 14:38 -0500
  Re: Using a BRIDGE RECTIFIER in an audio circuit tabbypurr@gmail.com - 2017-03-30 14:01 -0700
  Re: Using a BRIDGE RECTIFIER in an audio circuit Dave M <dgminala at mediacombb dot net> - 2017-03-30 16:51 -0500
  Re: Using a BRIDGE RECTIFIER in an audio circuit Phil Allison <pallison49@gmail.com> - 2017-03-30 16:16 -0700
  Re: Using a BRIDGE RECTIFIER in an audio circuit jurb6006@gmail.com - 2017-04-06 23:00 -0700

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