Why Kinergetics SW-200 clipping?

The amp came with the speakers so I'm sure they are matched well. It is an external amp with a built in crossover. I'm using the crossover in my HK because the HK doesn't have pre-amp inputs.

The fuses that sometimes blow are the ones inline to the speakers. Therefore, it seems like the amp itself is sending too much power to the speakers. I was just wondering if there is some "power surge" effect caused when the amp can't get enough power and then tries to compensate.

The driver still seems to work fine at lower volume levels. Just at loud, bassy times (i.e. organ in phantom of the opera or a big movie scene), they start having problems.
.
.

(This thread is basically duplicate to a more general "clipping" thread I have in "tech talk." I'll go ahead and discontinue this thread and continue the one in tech talk so I'm not being redundnant. I appreciate your ideas, so please continue to provide them in the other thread!)

One issue you might have is that the room is 15 by 15 feet. This square room will generate a lot of standing waves. I would also check to insure that the woofers are moving in and out correctly. i.e. not out of phase. It can happen easily. Insure the subs drivers are all phased properly. Sometimes you have one coming out and the other going in which will cancel the bass. If you move towards one of the subs does the bass seem to get stronger? This would be a symptom of out of phase subs. Good luck. I also have exactly the same Kinergetics sub amp and have no trouble with clipping at all even in very large rooms with multiple drivers on each channel.