My amp is about halfway, not sure what the wattage of my sub is, I'd assume about 700w since it starts to clip once I turn the amp up over halfway. My radio is also turned to half bass. It actually doesn't rattle anything if I turn the radio's bass setting all the way up.

I had 2 12s on this amp, amp was all the way up. THAT would make things rattle haha. I missed my trunk space and the fact that I don't listen to music with the bass CRANKED so I'm back to 1 sub.