Fender Rumble 15 Rattling Speaker ?

[Robert Spencer]

The speaker in my practice has slowly began to rattle. I removed it for a visual inspection and found no sign of damage to it. I really don`t know anything about this sort of thing. Is there reason to believe it is actually the speaker with nothing visibly detectable?
I did also remove the back cover and see nothing out of place there either. All looked to be in place. It just sounds like a bad speaker.
Anyone familiar with this sort of thing? Thanks & take care. Bob

[craig.p]

Did you ever play it loud enough for it actually to BE the speaker?

Put the speaker back and pull the amp chassis out and put it on a padded surface and run it that way, just to make sure it's not some vibration-induced electronic problem. You'll probably have to extend the speaker connection. Some types of electronic problems can masquerade as blown speakers.