Seems to fly in the face of convention... Basically your saying one (as an example) one JTR Captivator 2400 > 2 PSA XV30. Captivator = $2400 and 2 PSA XV30 = $2600 with multi sub discount or there abouts.
Not saying your wrong at all...just trying to figure things out. It is for sure what I believed for a long time ...but from reading here sound theory does not seem to support it... Or I could be wrong in how i read these posts too.
My example is one of capability and sound quality. Two identical subs will almost universally sound and measure better than one in a typical home theater environment with multiple listening positions - assuming similar distances from the listening positions, specifically mlp and assuming no issues with phase or time delays. But, put plainly --- My experience was and is that the Seaton Submersive HP, or JTR Captivator is such a step up in performance that I'd take one of these two over a pair of $1000'ish sub and just deal with a slightly less desirable frequency response outside my mlp.
Two SVS PB13's in my room double stacked in a corner could cleanly hit 115dB on dubsteb at the main listening position as measured by a radio shack spl meter on c weighting, slow response. Two JTR Captivators in my room one on the left side of the screen and one on the right (NON CO-LOCATED) could cleanly hit 125dB on the same dubstep songs at the same main listening position as measured with the same spl meter on the same day during an A/B session. The guy I did this testing with purchased my used SVS anyway - because he was plenty happy with the SVS output (115dB was more than he needed) and he felt the SVS met his needs. To me there was no contest of which I preferred and I dreaded doing the comparison because I figured I'd lose the potential sale. To further the gap - that testing was done with the pair of Caps pair powered by a single EP4000 amp - 2ohm stereo. I've since purchased a Crown XLS-5000 which provides an additional several clean dB on top of the EP4000. I also run the crown in 2ohm stereo.
I immediately liked the JTR Captivator sound quality better than the SVS from the very first moment I heard them, and on every occasion there after. I moved the SVS pair all over the room, tried co-locating, every corner, every spot along the wall for 1.5 months of tinkering nearly daily to try to find the sound quality I liked. This was before I had measuring gear - so I was just moving them and trying, moving and trying. The moment I popped open the box on the JTRs I purchased and played them from the middle of the room in eagerness - I immediately knew this is the subwoofer for me. Putting the subs up on l and r of the screen next to my left and right channels (as shown in my signature pic) just made them sound all the better! The tremendous spl capability of the JTR was just obscene bonus. In my opinion - the JTR isn't just a single step up from the SVS or HSU or Empire or for that matter any $1000 sub I've heard. Perhaps if a sub was just a single step up - two of a good would best one of a great. My biggest complaint for the typical $1000 offerings is about the time you start really cranking them up and starting those forced grins is about the time they start running out of headroom/clean sound and entering into compression which kills off/dampens the low note feel. I'll admit I like my sound louder than many, and desire the ability to have car audio type levels of bass with the sound clarity found with great home audio.
Edited by Archaea - 2/11/13 at 6:15pm