Help with a crackling subwoofer

[victimsofadown]

About a year ago I bought a 5.1 HTiB (Polk Audio RM6750). It worked great until about a month ago, when out of no where it started crackling during specific portions of films, television shows, games, etc. To give an example: explosions, swelling of music, etc. It seems to be related to a tone or set of tones where instead of playing the bass tone like it used to it just crackles like crazy, and when tone ends in the feature the crackling goes away.

Being very frustrated I called Polk Audio support and they recommended that I remove the back panel of the subwoofer (where the computery stuff is) and send it back in, because it sounded to him like the computer panel was interpreting something incorrectly.

I just wanted to check here, where I know everyone is very knowledgable, before I send it off because I have to pay for shipping. It just doesn't quite sit right with me for two reasons:

#1-From what I've read (briefly) on the web, it appears to me that my subwoofer has been "blown" which from what I've read (once again, briefly) would imply that the entire speaker need be replaced

#2-I know it happens occasionally, but without changing any inputs or settings on the subwoofer why would its computer randomly go bad?


I really appreciate any help you guys can give me, once again I don't claim to know anything about speakers, but I know you guys do!