Comments on: Can you add a amplifier to a stereo receiver with no pre-outs? http://audiograveyard.info/other-electronics/can-you-add-a-amplifier-to-a-stereo-receiver-with-no-pre-outs All About vintage pro audio Thu, 09 Sep 2010 13:45:28 +0000 http://wordpress.org/?v=2.2.2 By: Serafis http://audiograveyard.info/other-electronics/can-you-add-a-amplifier-to-a-stereo-receiver-with-no-pre-outs#comment-562 Serafis Sun, 14 Jun 2009 12:25:10 +0000 http://audiograveyard.info/other-electronics/can-you-add-a-amplifier-to-a-stereo-receiver-with-no-pre-outs#comment-562 If the slave amp(s)s have their own preamps (i.e. volume control) then you could perhaps use tape / md / vcr audio outputs from the master amp into aux /r tape / vcr / cd (NOT phono or mic) inputs on the slave amp(s) using standard RCA cables. These outputs should be at normal line levels so should feed the slave amp(s) fine. However, these outputs are usually not attenuated by the master amp's volume control, so if the slave amps are just power amps, then you would need to buy / build a volume control between the master receiver and the slave amps. Also, eware earth (ground) loops that can introduce bad hum, so best to make sure there's only one grounding point for all the amps. If the slave amp(s)s have their own preamps (i.e. volume control) then you could perhaps use tape / md / vcr audio outputs from the master amp into aux /r tape / vcr / cd (NOT phono or mic) inputs on the slave amp(s) using standard RCA cables. These outputs should be at normal line levels so should feed the slave amp(s) fine.

However, these outputs are usually not attenuated by the master amp’s volume control, so if the slave amps are just power amps, then you would need to buy / build a volume control between the master receiver and the slave amps.

Also, eware earth (ground) loops that can introduce bad hum, so best to make sure there’s only one grounding point for all the amps.

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