Smitty. What are the specs on the amp. I might be interested.

As for kickers being crap you are out of your mind. I have a 4 in my labrisa and they are loud and clear to the point my neighbors can hear me coming down the lake crystal clear. If you had crappy ones the crossovers where not set right. One more thing about marine and auto speakers. Marine grade speakers tend to throw sound in a wider range then auto. Auto speakers are in an enclosed space so the sound will bounce around a car where marine speakers have nothing to bounce off. For a sub it won't make a difference. Good wires and crossovers make all the difference in sound. If you use cheap radio shack garbage your sound is going to suffer.