They just quit!!

Your location says "The Abyss". Maybe they got waterlogged. You should take a look at the drivers and see if the wires broke off somewhere, including the voice coil leads.
- Mike

 

First step is meter the coils on the JBLs. If open, you have burned them out for whatever reason. If you don't have a meter, hook up a flashlight battery and see if the cones move. This will establish dead or alive drivers.

Then start moving upstream, and borrow whatever parts you need to swap until you find the dead one.

 

Seems paculiar that you put them away working and now they do nothing. Does some else have access to the cabs? Maybe they were blown by someone while you weren't there.

 

Mike,

If the signal chain is from the source through you speaker cables is OK, is it possible that your Peavey enclosures and/or the JBL drivers are protected by a fuse or breaker system of some sort and that might be the problem? Although it does seem unusual that both cabinets would crap out simultaneously. I hope that it's not something costly.

 

Did you find the problem with those cabs?

 

Mike,

Were you able to get a resolution to this yet? Hope it was just a loose connection or something minor.

 

Nearby lightning strikes can sometimes cause this kind of thing. Whatever the cause, it is unfortunate.
- Mike

 

Mike,

That really hurts!

Between the last time that they worked (your last gig, I think) and your initial discovery of the malfunction, could anyone else have gotten to your rig without your knowledge? At the gig, was the power chain to your rig protected by any surge suppression or power conditioning gear? My experience has been that whenever you play out, you just never know what kind of strange electrical gotcha's may come your way (inferior / faulty wiring etc.). Just some thoughts. The sad thing is that it's money that you should not have to spend in this manner but could have spent elsewhere.

 

Yikes!

Were they re-coneable?

 

If you didn't notice any problem with them as of when you last used them - and they were always under your control, then a lightning strike might be more plausible. Was there any thunderstorm in your area during that time? Where were they stored? A surge protector on the amps might not be effective in such cases.
- Mike

 

My regrets on your loss. I've never seen coils fry so bad that they destroy the magenetic assembly. New JBLs are a serious expense.

Is it possible you are using an under powered amp?