We've tried this with two different amps, one of them DEFINETLY works. One was an interfire and the other a sony xplode.

The subs are two 12" dual voice coils wired in a series/parallel pattern as obtained from JL Audios wiring diagrams. The diagram is at the bottom of this post.

Amp is wired to the subs correctly, however the rest of the wiring is in question as I didn't do it. The headunit is a newer Alpine 9830.

After turning on the headunit the power light on the amp will come on for 1 second, then immediately turn off. The protection light does not come on on the interfire, the sony had only one "power/protection" light.

We tried hotwiring the remote wire directly to a 12v constant and it did the same thing. The constant to the radio works fine as it holds it's settings, so it is getting power from the battery.

So my question is, does anyone know what might cause this? The only thing I can figure is maybe the 30 amp fuse in the power cable to the amp might be causing it, or it might be grounding out.

bad ground

my friends Sony did that all the time b4 we fixed the ground problem

drill a new hole and sand the area b4 putting the ground back on

Definitely could be a bad ground. Disconnect the speakers, still do it? What are you using for power/ground cable? Where you getting power from?

90 % Of amps cutting out, is the ground wire

You're all right, turned out to be a bad ground. Where I had hooked it, it turned out that the nut backed out.