Great sub. I run a single 10" off a kenwood 4 channel amp. 2 channels are for the fronts and the other 2 are bridged for this sub. I made a box that is 1.1 cubic feet to go with this. No issues whatsoever.

I listen to trance, reggae and metal and the sub adds OOMPH that the base system was lacking. For the occasional rap or hip hop song the sub does dig down low.

I regularly drive 4+ hours to go hiking. I have my windows down and the music cranked and the sub has handled it all.

I have a pretty small trunk and wanted to save space and not be heard from down the block and this does just that. I'm satisfied with what it delivers off of just 150 watts so I think 400 watts would be more than I'd ever need.