Quad 2905 ESL Arcing Sparks

I seem to recall reading that the newer Quads such as yours have a protection circuit that is sacrificed to save the panels from damage in case of severe overload, and that after the circuit has engaged it needs to be replaced. Something like that. Perhaps Mobile Fidelity (the new U.S. Quad distributor) can help.

Thanks Bdp24, I didn't know that MOFI now carried Quad Audio. Yes, these protection circuits are suppose to work and in the past it has but not this time.
There's a repairman near Cleveland who may be able to do the repairs. And if they were still in warranty I'd be OK but I bought these a while ago. The Quad manual tells me to contact the dealer I bought them from, so in that case I need to call Audio Classics.
It's hell having something like this occur over the 4th of July weekend.
Thanks again.

take them to Play it Again Sams and have them contact Ken at Electrostatic solutions who may be able to help them over the phone.

Goofyfoot, Mobile Fidelity is now the U.S.A. distributor for Quad!

Sounds like a bad panel-
i owned Crosby moded ESL-63 for >20 yrs, with Entec LF20 Subs- sold quads wished i hadn't & bought 988's- traded 988/entec LF20 4 yrs ago as i live in HI with no AC & got tired of the humidity affecting the panels every few yrs & having to replace em after hearing noise, spitting, etc- got my rebuilt panels from Ken at ES solutions & had local guy who knows quads install panels-
Finally traded quads/Entec for mint pair of older Watt/Puppys with new drivers, etc. There not quads but i can rock em out & don't worry about replacing panels..