In article , Mark Glickman
wrote:

Hi all,

I have a system with a Pioneer VSX-3000 stereo receiver (a fairly
old receiver, 60Wpc) controlling decent SPL monitors in one room and
Cambridge soundwork speakers in a second room. I've
noticed that when I have the volume low, the sound in one of
the speakers in a pair often drops out completely, and
sporadically comes back in. This happens in both sets of
speakers in each room. When the volume setting is moderate
or high, the sound does not cut out.

I'm wondering if any of you have had a similar problem, and
in particular whether the problem is the receiver itself, or
perhaps related to speaker wires. I'm pretty sure the
problem isn't the speakers, but I could be wrong. I've
been thinking of upgrading my receiver anyway, in which case
I would find out my answer through simple experimentation,
but I was curious if this was a common problem.

Any thoughts would be appreciated!

Best,

- Mark

[snip]
I've had a similar problem with an SX-850 now and then, and find that a
periodic vigorous flipping of all the switches and rotation of all the
knobs while operating at an elevated sound level seems to restore
operation to normal, which leads me to conclude (as some others have)
that the problem is the result of contact oxidation that is being burnt
off during the process.

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