I've been fighting with my Gallien Krueger Backline 1x15 for quite some time. I recently sent the amp head in to GK to be repaired ($40 shipping.. yikes!). I got it back today, and when I hooked it up, nothing came out of the speaker. Not even a hiss or initial "click" from the power reaching it. This made me curious, because I had assumed that since the driver didn't appear damaged (no tears; the voice coils look fine) the problem HAD to be the amp. This is why I sent it in (and, just for the sake of more info, the only thing the GK tech did was replace the Low-Mid pot). Well, today I did what I should have done before I sent the amp in; I hooked the amp up to one of my stereo speakers, and it worked just fine! Then I did some more testing. I hooked the GK speaker to my home stereo, and I got nothing. Not even a hiss. So here's my question -- is it possible for speaker drivers to simply die? I didn't think it was. But now I think back to the day my GK combo suddenly stopped working.. and I wonder.. Any thoughts?