Just don't get your hopes up on any of the subs recommended or the ones you have mentioned. Your not going to find what your looking for in a commercial sub for that size of room within your budget. Your going to have to go DIY or at least spend over $1000 for something like the SVS ultra PB-13, Epik Phoenix, ED A7-450.
Or you can spread out the cost and get multiples of the lower line ED/SVS subs as the budget allows.
I don't think I agree, totally. For consumer equipment, this is probably true but Cerwin-Vega makes subs that would probably knock the paint off the wall. For pro audio, there are a lot of options and Parts Express or Musician's Friend would be two places to look. Musician's Friend has their 'Stupid Deal Of The Day' and sometimes, they toss a sub in there. $100-$150 gets a pretty good woofer for pro use and Parts Express has a Dayton SA-1000 subwoofer amp that, if the power output is what they state, is the deal of the century. It has level, crossover frequency and phase (0°-180°) controls and a parametric EQ that controls center frequency, level and bandwidth. It has a bass boost (with the power this puts out, I can't see that as necessary), subsonic filter (
this is definitely necessary) and triggered turn on that can be switched off, set for on with signal voltage and it also has a 3.5mm jack for triggered output, like on some receivers. It sports LFE input as well as L & R inputs and has a stereo pair of high pass output jacks, all RCA. Two pairs of speaker terminals complete the back panel and the manual explains how to eliminate hum. Oh, yeah- the controls on the front can be pressed flush when adjustments are done.
http://www.parts-express.com/pe/showdetl.cfm?Partnumber=300-811
I just hope it's powerful enough.
I do have doubts that many setups will do what yours can, though. Your voice was being modulated in your video and that's not easy to accomplish without doing something completely different from normal.