Since it hasn't come up yet, did You check that the speaker is still working?
With a multmeter preferably, the battery test ONLY
with all the speakers wired.
Most drivers can take 9V alone, but not all of them.
A driver turned into a passive radiator will flap around its resonant frequency.
Scuffing sound can IMO be described as the inrush sound of air on a vacuum cleaner nozzle.
Originally Posted by russpurdy
Opened up the cab, pressed on the cone and there was a scratching sound. All other speakers were silent. Took out the speaker and tried the test again when it was unhooked. No scratching. Hooked it back up again and it scratches again. Does this mean a bad voice coil? Why does it only scratch when wired up to the cab?
It most likely scratches without being wired as well.
Does sound like a bent basket, very common with heavy ceramic magnets on wimpy stamped steel baskets.
One of the real reasons behind that ancient debate about the correct orientation in which to transport big (cheap) speakers
Straightening a bent basket out is a crapshoot at best, and IME only a band aid fix even then.
No matter how well You manage to align the voice coil the damage has been done to the VC, or the wires insulation at least, and it'll break sooner or later.
You may get a few more miles out of it by visually examining the mounting edge resting on the baffle, looking for gaps and shimming them.
Looking for any irregularities on the baffle mounting surface and the seal as well. Obviously.
Shimming a bent basket airtight
so no scratching is felt/heard when all the mounting screws are tightened is a bit time consuming, but if the replacement is hard to get or the money is tight, that'll give You some time to source the replacement.