Hi fhw,

You've got to swap the speakers first to see if the static-like sound stays with the speaker or remains in the original channel. The way you describe the sound, it might be a noisy channel or intermittent connection in your amp's left-channel circuitry. It's not RF and I'm fairly certain it isn't a bent or warped voice-coil former, because that produces a mechanical scraping sound. Switch the surrounds and then call Joe if you're still getting the problem.

Regards,

Alan Lofft,
Axiom Resident Expert (Retired)