I have the Onkyo HTS-650 5.1 home theater in a box system. It sounds great to me and all, but I would like a little more deep bass if at all possible. Is there a way I could add a 2nd subwoofer to this system for more bass? I would like to keep the one that came with the system and just add an additional woofer. Also, if this is possible, could you recommend some decent subs to me for around $100. Also, how would I go about hooking up an additional subwoofer to this system (what would I plug it into, etc.) Would adding a 2nd sub really add a lot of bass to my system? i don't just want to split the bass going to my sub now and go 1/2 and 1/2 to each sub. i would like to double my bass! i appreciate anyone who helps me out, thanks!