GK Amp making lots of crackling noises

[CooperRex]

I have a new setup that is now on the fritz. It's a GK 700RBII head with the GK Neo 212 cabinet. I've owned it for just a few months. Now I am getting tons of crackling noises and lousy signals. I thought it was the guitar input cable, so I changed that. No difference. Then I turned the bass amp volume down, the amp head volume down to 0, and the cabinet is still making lots of crackling noises, and I can see the speakers vibrating. What is going on? I didn't buy the Pro Coverage through Guitar Center, so now I have to go through GK's warranty or an independent service shop. And I have a gig in 10 days Any thoughts?

[lumerino]

the problem is the internal crossover, the conection between the woofer and the tweeter could be wrong, maybe one or two wires damaged, although it is easy check and repair i recommend that you go to GK´s warranty because the crossover can be damaged(and it is not easy to find/repair) i hope that the problem is easy

[CooperRex]

I don't know much about amps. Does it sound like a problem with the cabinet, not the head? Or could it be either?

Thanks

[B-string]

Sounds more like a problem in the amp head, best get it checked out. http://www.gallien.com/support_service.html to find a service center in your area or email jason@gallien.com If you are using a non G-K speakon cable (the G-K cable should have come with the cab) you could have a problem with the speaker cable tying the woofer and tweeter amps together (which is bad news).