So, I love that Audioholics goes for measurements. I'd like to add some exploration of that to this thread.
There are published measurements on the R-115SW (sites like camelcamelcamel say it was occasionally as low as $600, and $720 (20% off) several times per year, but usually $900). Klipsch has essentially re-released this sub as the SPL-150SW for $1,150. (If you compare the spec sheets they appear to be 100% identical in literally every reported spec and dimension.) I think it is nearly identical to its precursor, as well, but don't have the data on hand for that. The measurements are from:
https://hometheaterreview.com/klipsch-r-115sw-subwoofer-reviewed/?page=2 and show:
CEA 2010 Traditional
1M 2M
63 Hz 123.3 dB 114.3 dB
50 Hz 124.7 dB 115.7 dB
40 Hz 121.4 dB 112.4 dB
31.5 Hz 118.6 dB 109.6 dB
25 Hz 113.8 dB 104.8 dB
20 Hz 108.7 dB 99.7 dB
Comparing to the brand new SVS PB-2000 Pro at $899 seems the closest initial comparison, but I don't think Audioholics has published data yet, so I'll use the PB-2000 (which was $799, not sure of the range of SVS sales, but $100 off seems to happen in this price range):
Traditional
2M
63Hz 111.5 dB
50Hz 110.5 dB
40Hz 110.1 dB
31.5Hz 109.6 dB
25Hz 107.6 dB
20Hz 103.8 dB
That's +2.8, +5.2, +2.3, 0, -2.8, -4.1 db for the Klipsch across the range. I'm not sure what to think about that. I'm tempted to call it a wash, though I'm sure some will want those extra db at the lowest end. If I understand things correctly, and I may not, subs are supposed to be able to achieve 115 db at reference level, which would mean both have
potential limitations. Although I usually listen at reference -12 which would make both pretty acceptable for some people like me. The impact of the room, and having two subs would also mitigate these limitations.
Overall, they don't seem to be entirely dissimilar, though.
Size-wise:
SVS - 20.9” x 17.3” x 22” 66 pounds (7954 cubic inches)
Klipsch - 21.5" x 19.5" x 22.3" 75.4 pounds (9349 cubic inches)
So the Klipsch is slightly larger and heavier. I think it's probably a non-trivial difference, but that's just my perspective.
Overall, it seems to me that Klipsch already has a competitor to the mid-range SVs (level 2 of 5?). But this is the Reference series Klipsch and mid-range SVS - but comparable price-wise.
If Klipsch used a better, higher excursion 15" driver in that cabinet, they could surely do better, couldn't they? It seems like they'd have a variety of options for trying to make subs that went up against the significantly more expensive larger SVS subs. I'm not saying they
should or
will, just that it doesn't seem crazy to me that they could.
(I am lucky enough to have had Klipsch, SVS, Hsu, and other subs. I bought the Klipsch, above, on deep discount last winter, but the only SVS I have on hand now is the SB-12NSD, and that is not at all in the same class. So I can't do personal impression testing with the PB-2000 or above.)