Quote:
Originally Posted by
Archaea 
I'd buy the hsu. These two subs were compared directly in the 2011 KC sub meet listed in my signature. I'd you were primarily movies I'd recommend svs, since mix I'd recommend hsu. You really can't go wrong with either and they are fairly equitable subs.
Well I think they have changed the enclosure, driver, and amplifier since that model, so not sure how comparable that is. Here is what audioholics numbers show, which are somewhat comparable.
Hsu Research VTF-15H CEA Test Performance
Frequency Maximum Peak SPL @ 1 Meter RMS @ 2 meters
20 Hz 112.9 dB 103.9 dB
25 Hz 118.8 dB 109.8 dB
32 Hz 122.0 dB 113 dB
40 Hz 124.7 dB 115.7 dB
50 Hz 124.7 dB 115.7 dB
63 Hz 124.6 dB 115.6 dB
HSU's own numbers maximum peak spl @1 meter
20 hz 114db
31.5 hz 121db
40-100 hz 123-125db
SVS pb12+
Frequency Maximum Peak SPL @ 1 Meter RMS SPL @ 2 Meters
20 hz 114.4db 107db
25 hz 117db 109.5db
32 hz 119db 111.5db
40 hz 121.4db 114.3db
50 hz 122.8db 115.3db
63 hz 122.8db 115.3db
Update: 9/27/11
In order to make it easier for our readers to compare our CEA data between subwoofers tested prior to our new Subwoofer Measurement Protocol, we scaled our 1 meter peak CEA data to 2 meter RMS by subtracting 9dB for each frequency. We then added 1.5dB to the final result since SVS recently updated the DSP in the PB12-Plus DSP to yield 1.5-2dB more output across the entire subwoofers usable bandwidth.
Rythmik FV-15HP CEA Test Performance
Frequency Maximum Peak SPL @ 1 Meter RMS SPL @ 2 Meters
20 Hz 116.5 dB 107.5 dB
25 Hz 122.0 dB 113 dB
32 Hz 126.8 dB 117.8 dB
40 Hz 129.0 dB 120 dB
50 Hz 128.9 dB 119.9 dB
63 Hz 128.7 dB 119.7 dB
All are excellent subs at their price point. I agree with Phillip to go with the fv15hp if you don't mind the extra coin. Of course by then you are almost half way to buying a second vtf-15H, and multisubs is a proven solution to better in room bass response while adding output. I have two 15H spread out and have smooth in room rising response house curve to 16hz with plenty of headroom available at my listening levels (-10 to -8) with the most punishing bass movies.

PS Took me over hour to type this, babies don't care about forum posts.