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I looked the system, up and i think the one you got has the included Infinity amp. That should be more then enough power as its the amp they are recommending. What i saw for specs was 100 or 150 RMS...

I have seen a few of these on some boats at one of the lakes i go to. I have not personally herd them.

I couldn't find a clamp size on them but did find some pictures of the clamp type they are...