Confused... help me get my system running

[Stingroo 10+ year member]

Okay so here's what I've got.

2 JL 12W3v2-d4

One AP1500-1d

I wired the subs together to show the amp a 4ohm load. Should be 600W RMS they're getting, which is fine enough since they're rated at 300W RMS a piece. Right? Okay.

I soldered all of the connections. On the subs and on the box (it has terminals on it). Then I ran the wire to the amp. Started it up, and everything worked.

For a few minutes.

I shut it off, pulled the subs out of the box and discovered that one of my solders came off. Okay fine, re-solder, check all the others. Everything is fine. I play it again, same result. Works, but only for a minute or two and then cuts out. This time I pulled the subs, and they were fine. All the solders held. All the wiring looks okay. In-line fuse isn't blown. Power light on amp comes on. Doesn't go into protect mode.

Where do I go from here?

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[mylows10 5,000+ posts]

check grounds ,make sure they are tight and no paint on the area ,then check power and remote wires for voltage