Question about Focusrite ISA428 Pre Pack quad microphone preamp (with )
Does this happen with no mics AND outputs connected? If it doesn't, you have a severe ground loop problem. Make sure ALL interconnected equipment is powered from teh same receptacle or power source. Use ONLY balanced lines, XLR or TRS cables. A possible problem MIGHT be supersonic feedback that you can't hear but is saturating the amp. Thats is why we disconnect all inouts and outputs and observe if symtoms are still there.
Posted on Apr 06, 2011
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Posted on Jan 02, 2017
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