2. amps-preamps
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Intermittent hum in right Krell fpb 350 mono

Maybe you have experienced this but it is driving me crazy. Everything plays perfect, go to bed, next day, turn on the system and there is a loud hum in the right channel. Switch ICs in the back of the processor and the hum goes to the left channel. wiggle the plug on the amp, turn the amp on and off, wahlla! hum disappears and the system is perfect again. Occasionally that same right channel "fades" so I turn off the amp, wait a few seconds, turn it back on and it is at full strength.

I live in Mexico now so sending the amp in would probably cost more than the purchase price (if I ever got it back). Any thoughts?
puerto

Showing 2 responses by sidssp

sidssp
1,077 posts
 
Since the hum went to the left channel after you switched interconnect, the problem wasn't in your power amp, it was in your preamp/processor.
sidssp
1,077 posts
 
No, since you switched the interconnect, the right channel of your preamp is now driving the left channel of your power amp. If the problem were in the power amp, no matter how you switched the interconnect, the hum should still stay on the right side. So the hum was either caused by the interconnect or by the preamp.
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