How it's sound? I have 10" 2 coils "Orion" sub with max power 400 watt and Xtreem mono amp 2 chanel with 500 watt max output just for sub. I mounted mine to cover with lot's of "Dyno..." and inside too, so I've created something like a box for a sub. Got boom booms now (joke), but it sounds much better then factory original stereo system.
Only problem is the heat. If I am listening music too loud both amp and sub getting warm. Maybe small cooling fan will help a bit.