Hey guys, been hanging around a little here, and I am working my way up to finally building a DIY sub (or 2) I think. Problem is, everytime I think I've made my mind up to do something, I re-think the whole thing. Here's my current subwoofer set-up... I have 1 Sony SA-WM40 corner loaded. I get pretty flat response considering it's a $150 sub, down to around 35 Hz. After that, it falls off quickly. The big problem I'm facing is too little bass. I really like bass, and this doesn't do it for me. I watch a lot of (primarily action) movies, and play a little classic rock, jazz, or classical. Ratio is probably 85% movies, 15% music. My listening / HT room is 34' long, 17' wide, with a vaulted ceiling, measuring 25' at the peak... so, it's a BIG ROOM TO FILL. Further, it opens to the loft on the rear left-hand (facing the TV) upper wall, and into the kitchen just below that... The TV is on the right-front corner, and the front door is on the front-left corner. The sofa is in the center of the room. Right and left surrounds are approximately centered in the room, and rear center surround is on the back wall (34' from tv). OK, now for the questions. That little Sony just doesn't cut it. It bottoms out or clips (not sure which) whenever I get close to reference levels in movies. All speakers are set up using the radio shack meter (corrected for the RS spl meter's inaccuracies) I need a serious sub(s). So, I began to look at what was available. Within my spending limits (wife-imposed), I figure I could probably get one SVS powered sub, or build a couple of good DIY subs. I was originally planning on building 2 shiva-based subs, but I just found a contact with 2 original SVS subs for sale. How would these compare, and what power requirements would these have compared with the Shiva. I'd ideally like to run these off my old Technics receiver, rated at 150 x 2 @ 4 ohms. (if this is unrealistic, please let me know) Finally, being new to the DIY arena, and still having only a simple understanding of the physics involved, what type of enclosure should I look to? I'd probably either (1) have these subs aligned both in the front-right corner, approximately 2' behind the RPTV, or (2) aligned on either side of the couch, depending on the enclosure size, of course. I'm assuming that a ported enclosure would be best with either of these subs, as my bass requirements are high, but would a "cube" design work well? Thanks for any and all input.