On Tue, 20 Nov 2012 10:55:03 -0800 (PST), DerbyDad03
wrote:


I'm not doubting anyone's assessment of the situation, but I have to
at least question the loose connection/broken wire as the root cause.

How would a loose connection cause this to happen:

Environment:

- Volume is up high.
- Left rear speaker is crackling
- Right rear speaker is crackling

Action:

- Unplug the left rear speaker wire from the back the surround sound
system.

Result:

- Left rear speaker goes dead (of course)
- Right rear speaker stops crackling

Why would the right rear speaker stop crackling when the left rear
speaker wire is unplugged? Could the loose connection cause feedback
through the system (maybe through the ground?) and back out to the
rear speaker?

If the noise was ending up on the ground, wouldn't it also be present
at the front speakers, center speaker and sub-woofer? It never is.
We do not know enough about your system to say with any certainty -
but a bad onnection on one output CAN cause noise on the other channel
of the same amplifier - so if you have a "bi-amped" system, where the
front and rear use separate amps, the interference would not affect
the front speakers.