I've been looking for the perfect fit for my 8500 ft^3 great-room that opens to a hallway and a stairwell. I'm 90% Home Theater. Budget is flexible, but I'm not prepared to pay much more than $3K.
Given the space, I believe ported is the way to go. Given my room, I can handle up to 2 Subwoofers. Looking for something in Black to match the room. Think I can handle this size of the subs considered, but no bigger!
So the volume of space is super-high, and I'm looking for HT, so output is a big key for me.
The new contenders are the HSU VTF-15H and the Rythmik FV15HP. They are the frontrunners for me. They are both darn close to the ED A7-350 in terms of driver, size and appearance, so I'll include it as well.
Size (with Grill & Feet)
HSU - 26" H x 27" D x 18" W (added 1 for feet and grill)
Ryth - 26" H x 26" D x 18" W (no feet included, added 2 for pad that will likely be required)
ED - 32" H x 24" D x 20" W (no feet included, added 4 for pad that is inlcuded)
Verdict: Pretty close. Not much separation here. ED a bit bigger.
HSU - 1400 W short term, 350 W continuous
Ryth - 600 RMS class H patented servo controlled
ED - 1300W
Verdict: Unclear to me how to interpret this. Not sure if the 1300W for ED is comparable to HSU's 1400W or 350W. Rythmik is in the middle, but again, don't know how to compare with HSU. Note this is Rythmik's high power version, vs. stock version at 370W.
HSU - 15 woofer, very low Q (0.25)
Ryth - 15" high excursion, aluminum
ED - 15" subwoofer, under-hung motor, 30MM one way Xmax
Verdict: Hard for me to compare here. Rythmik's key differentiator is Servo Control, which is supposed to improve accuracy, but it has been suggested in some posts that this accuracy might come at the cost of output. Some say accuracy is important in sub-woofers, other seem to suggest that you can't hear distortion at near-subsonic levels anyway. HSU seems to have tons of love, admiration, and respect on the board. Key differentiator is focus on engineering. Hard to directly translate this into performance (thought see next section).
HSU - CEA2010 peak output capability from 40-100Hz, 121dB @ 31.5Hz, 118dB @ 25Hz, 114dB @ 20Hz
Ryth - no info
ED - No info, but has been in the market for a long time.
Verdict: Again, difficult for me to say. At the end of the day, the most important factor is to really fill up my room with heart-thumping bass.
For HSU, CEA measurements have been impressive, similar/higher than SVS PB-13U. Some folks doing the calculations have disputed these numbers, but others are suggesting that HSU's configuration is producing this superior result. Mathematically I can see how low-Q would increase efficiency, but don't really understand what this means to performance. Seems unlikely that HSU would lie about the output numbers, as it will be easy enough to reproduce these results.
I have no reference for the Rythmik. Here is what Brian from Rythmik says Naturally, customer would compare this with PB13U. Ours is slightly smaller. However, that is intentional because it makes the maximum output extension to 18hz, just between the 3-port tune and 2-port tune of PB13 Ultra. If we can improve sound quality of sealed subwoofers with servo, we can also do that with vented subs Not a very direct answer. Hard to interpret, but didn't sound too positive.
The ED has been out for a long time, but I don't think it has been reported to be on-par or better than SVS PB13U
HSU - Satin black or Rosenut (+$120)
Ryth - Black oak
ED - Matte Black (veneer for +200-250)
Verdict: Rythmik wins. Like the Black Oak finish. Nicely crafted.
HSU Balck Satin not as nice as the Black Oak. Don't like the exposed triangular ports on the HSU. All these subs are big, but i think the exposed ports will make it stick out even more.
ED last with the Matte Black.
Price for 2x (2 units plus shipping)
HSU - $1936 (1658 + 278) from HSU DualDrive webpage is not up yet, but base price is $1658
Ryth - $2552 (2278 + 274) (no feet or pad included)
ED - $2400 (2400 + 1) (comes with free pads worth $130)
Verdict - HSU the clear winner here
Rythmik appears to be the leader in sound quality and appearance. Not clear how much better or important SQ will be as compared to HSU. HSU may be the output king, and the best value at $616 less than the Rythmik. HSU has feet included, which I think would elevate the need for a pad???, so would likely need to buy 2x pads for Rythmik for another $100-200. Based on price, probably leaning toward HSU.
Would love to hear others thoughts.