wrote:
On Tue, 20 Nov 2012 12:00:38 -0800, Bill
wrote:


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


Try leaving the first speaker connected and disconnect the
other speaker.

Then a test is to run a different wire or wires along the
floor and see if those different wires eliminate
the problem.

Or try different speakers.

Or try a different amplifier.

Note: Wires which are run in a house can have nicks or shorts
if they have scraped something metal. Or a wire staple holding
the wire might be shorting it or shorting to a metal object
in the wall (grounding it).

Wires run close together for a long distance can "induce"
electricity in the other wire. Try using "shielded" wire.
This wire has foil around the wires like this...
http://www.indyav.com/product_images...2SC__17935.JPG


Sheilding is not usually required - but twisted pair cable is
DEFINITEY recommended. It eliminates "common mode" noise.

Twisted is not going to be better than close pairs. Close pairs eliminates
common mode noise. Twisted brings it up in higher frequency rejection, and
when run with other close pairs in close proximity.

Along with my unstable comment, that would include oscillations as
mentioned by another poster.

Bigger amp, less prone to stability problems.

Ferrite core, may or may not help. Adding series resistor may help.

Seems like you best need to stay with larger gauge wire.

Greg