Can i do this for a home theater setup?

>>59109187
the amp is ridiculously overpowered and pa amps are often too noisy for a home setup
you want a separate amp channel and a crossover for your sub if it's not an active one

>>59109219
http://www.parts-express.com/dayton-audio-12-ultimax-subwoofer-and-cabinet-bundle--300-7096

what sub amp should i get for this? i cant find anything but super expensive shit and plate amp. i feel like giving up and getting a plate amp and using it as an external.

right now im using a sony ta-av411 connected to headphone preamp to computer.