Hi all - I'm new to this forum and hoping this newbie question doesn't come off as woefully idiotic!
I have a JBL K120 I'm using for guitar. Recently the speaker started acting up. Basically, I can fire it up and it will play beautifully for a few minutes, then it may crackle a little bit before going silent or just die altogether. If I give it a little more or less juice, just moving the power amp volume around a little bit it will sometime wake up again briefly. But not always.
If I shut everything down and wait 1/2 hour or so, I can bring it back to life (usually), but same problem repeats. I've tested it with several different amps and speaker wires and got the same issues, so I'm pretty confident that the speaker is, in fact, the problem.
Anyway, any diagnosis or prognosis is much appreciated. This is killing me!