Just a standard 1+,1- 4 pole speakon (which I hope does not have a loose wire in one connector or the other?).
When I first plugged it in, I used a speakon to 1/4" jack into my Ampeg 210av, at this point it cut out after 2 minutes.
Right now I'm going into a GK 212 and using a Live Wire Elite 2 x 12 ga speakon cables. The end say Neutrik NL2FC then says +1.
Not sure what any of this means, I'm kind of new to the speakon thing.
Cables are good, they work fine when I use another head.