Originally posted by Diki:
Would it have a separate op amp to the main amp, Mac? That is what is so puzzling. No bipolarity disorder on the main outs 
Shouldn't the RCA outs simply mirror the mains?Not necessarily.
If the designer did the breakout *before* the opamps that are used to drive each different output, a likely scenario, then there could be just one opamp driving the one set of outputs that is bad.
Schematic would be the place to find out, if one is available.
--Mac
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