I recently started listening to a new mercury with Buff III 9038. Using headphones, it sounds like the left channel might be ever so slightly louder than the other. I used 1% 62r vishay z foil resistors that were matched in pairs. I tested each again with a multimeter and they measure 62.2 for one pair and 62.4 for the second pair, so they seemed within an acceptable tolerance.

Placid HD measures 14.87v- out and 15.02v+ out. I used fixed resistors here so they are slightly different.

I measure the below mv on each output:

Balanced L: 4.6- and 5+
SE L: 2.1

Balanced R: 4- and 4.4+
SE R: 1.9

Should these values be closer to the left and right channels?

Try measuring the output voltages of the AVCC regulator.

Ideally the resistors should be matched to at least 0.1%. I think you are closer to 1%. That may or may not be the issue. Any chance you could try the supplied resistors?

Edited by user Tuesday, March 24, 2020 12:54:41 PM(UTC)  | Reason: Not specified