Gig tonight- need help- 4 ohm head- 2x 4 ohm cabs

Yes, it will blow up. [/thread]

 

Can you get a series speaker cable in the time you have remaining?

 

You need to just pick one of the cabs. You may damage the head, or it may go into protection mode and go silent while you're playing. One of those two things will be the most likely result.

 

Run one cab. If you run both it will cause issues and possibly blow the amp and cabs.

Can’t stress this enough.

 

IF you know what you're doing you can make a series speaker cable.

 

The back of the 700 RB states:
"One or two 8 ohm cabinets
or one 4 ohm cabinet"

Heed what Gallien-Krueger wrote on the amp or you will likely damage something and screw your gig.

 

yes.

 

Yes. Unless it's a serial cable.

You can stack the cabs, plug in the top one. It'l look killer and sound good 'cause the top cab will be firing at your ears.

Good luck with the gig!

 

I’d bet 20:1 that the output stage of the amp will cook if it doesn’t go into thermal protection mode first.

 

what are the two cabs

 

If you mean running a cable from one cab to the other, it's identical to running the cabs from two outputs on the amp - they're still in parallel.

 

So how did the gig turn out? What solution did you use?
Personally I liked the stack the two cabs and only plug the top one in for tonight.
When you have time to sit down and actually make or buy one, a serial cable or serial box will do what you want.
For future reference:
What is the best way to connect speakers or cabinets?

 

Amp most likely thermals- Shute off to protect itself. Minutes of silence ensue.

 

If you like magic smoke, go for it.

 

Running one 4x10 is a good choice

If you run 2 cabs in serial then the load becomes 8 ohms and that reduces the power

You best bet is 2 heads … each running one cab

 

This. If you borrow a buddy's amp or even a PA amp and run the effects send from yours into it.

 

If you think you might have your cabs wired in series, there’s an easy way to tell - unplug one cab. If they’re wired in series, both cabs will stop making sound. If the one still plugged in continues to play, they’re wired in parallel. Needless to say, this experiment should be done at low volume.

 

Personally I'd strongly advise against series cables. It's the sort of 'clever' solution that can easily go horribly wrong. If I needed to do this regularly, then, assuming these are 4x cabs, I'd rewire them internally to be 16ohm.