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Multi-channel Ground Lift
Multi-channel Ground Lift
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Old 20th April 2009, 04:50 PM   #1
Bigun is offline Bigun  Canada
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Location: Waterloo, ON or Herefordshire UK
Multi-channel Ground Lift
Default Multi-channel Ground Lift

I've seen some discussion on stereo and mono but very little on multi-channel. If you were designing an amplifier module for use in a multi-channel system with unbalanced inputs (e.g. HT), what strategy would you employ for ground lift (do it on each amplifier channel, do it once by ganging all the input signal grounds where they enter the box etc) ?

I think it's safe to assume that there would be a lot of cases where only a single-source is involved (in my case a Blue-Ray player).
"The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed." Robert M Pirsig.
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Old 20th April 2009, 06:43 PM   #2
AndrewT is offline AndrewT  Scotland
Join Date: Jul 2004
Location: Scottish Borders
please don't use the term ground lift.
It implies that the Audio Ground is not connected to the Safety Earth.

Where are your speakers in your HT layout?
I think each of your amplifiers should be next to the speaker it is driving.
That removes the need for your question.
regards Andrew T.
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