A little wiring help

Hey fellas. I'm having a little trouble with my system, specifically my sub setup. Let me lay it out for you.

I have this amp Alpine Electronics of America, Inc.

powering these two dualvc 4ohm subs

1: Alpine SWS-1041D 10" Dual 4-ohm Voice Coil subwoofer at Crutchfield.com

2: DD Audio: Mobile Audio | Woofers | 500 Series | DD Audio
(click specifications, then click 510b)

So here's my problem. When I push the bass too high, I hear a click and the amp sub stops outputting. I assume I just need to set the gain (the right way) but I just wanted to make sure I had the subs wired up right before I adjust the gain..

So, basically, I made a makeshift layman's wiring diagram in paint. Here's how my subs are currently wired.



Subs are dvc 4ohms
amp is 500w @ 2ohm, 300W @ 4 ohms

Does this make you cringe condescendingly? If so, tell me what I'm doing wrong!!!

Thanks guys!!!