[LAU] Ground lifts, TRS, etc. to PA? USB/other signal crossover to audio?

Fons Adriaensen fons at linuxaudio.org
Fri May 9 09:13:15 UTC 2014

On Thu, May 08, 2014 at 06:02:53PM -0500, Reuben Martin wrote:
> It sometimes makes sense to lift the AC ground if you are pulling power from 
> more than one source. (To prevent ground loops) As long everything is grounded 
> to the remaining source correctly.

If you lift the AC ground on some equipment it simply isn't
'correctly grounded' anymore. 

To be properly grounded, the connection to ground must have
sufficiently low resistance, and be permanent in the sense
that it can't be removed without removing power at the same
time. Signal cables fail on both grounds (pun not intended).


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