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In Reply to: RE: Based on his swapping methodology I have to agree - nt posted by murali on May 23, 2015 at 09:06:48
You have too much crap going on. Simplify by separating the components then proceed methodically.
If you can't separate the components then half-split then half-split again until you narrow it down. It's a common troubleshooting technique for systems and circuits.
Follow Ups:
Okay, the simplest test. I disconnected the source and preamp from my system and using different balanced interconnects, I connected my Marantz surround sound processor L/R directly to the Aesthetix power amp L/R, of course through the HP filter in front as always required for the Vandersteen Quatro. Played the test tones through Front L, Front R, Center, Rear R and Rear L speakers. The Front L sound is still low, at least 5 dB relative to the right (levels can be adjusted in test tones). When I swap the L/R at the power amp inputs, the lower sound shifts to the right channel.
So even without my stereo source and line stage in line, the left channel sound is lower by around 5 dB. Is there any other conclusion except that there is something wrong in the power amp? The question is what could be wrong with it.
Sorry, one mistake in my previous post. When I swapped the interconnects at the power amp inputs, the lower sound of Left channel DID NOT shift to the right, it continues in the L at around 5 dB lower than the right.
Apologies for the mistake.
If it were me, I'd get the processor out of the system and use just the linestage and power amp.... and a simple source like a CDP. Begin troubleshooting to determine if you have any channel imbalance between the L&R channels.... and be sure that your linestage balance control isn't offset.
IMHO, processors have too many variables that can be incorrectly set so that's the first item I would set aside and remove from the system to simplify the troubleshooting.
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