On Tue, 20 Jul 2010 18:38:52 -0700 (PDT), Reverend Fuzzy
wrote:

On Jul 20, 6:46*pm, "Phil Allison" wrote:
"Reverend Fuzzy"

If there is a cross-over board in the case, you may have an
electrolytic capacitor going bad.
When they over heat, they'll make those sort of noises.

** That is utterly bizarre crap.

.... *Phil

Not half as bizarre as your instant flaming of something I have seen
happen in my personal experience. If you haven't seen it, yourself,
don't just call my answer crap... PROVE it can't happen.

And you've seen electrolitics in cross-overs overheating and hissing?
I'm with Phil on this one...