Originally Posted by darkshadoku
Thank you all for the quick responses. I just looked up the HSU sub and all the videos/reviews seem to praise it over SVS and other subs in the same price range and below. Seeing as the HSU VTF-3 MK5 HP has a huge power increase over my current sub, does that somehow lessen the strain on the woofers on my fronts? I am not exactly sure how that works so just wondering if it directs most or all of the bass to the sub.
Also, in regards to the "my current sub lacking" well, to be honest I am not sure as I dont have anything to compare it to other than the sub from my previous onkyo home theater which... well the klipsch basically wrecks it in movies/sound tests such as the Dolby Atmos demo (with the lightning) which made my previous onkyo sub sound distorted. And the other note is that I have not tried going past the -9 sound level on my receiver, i try to keep within the -10 to -17 volume level as I am afraid if i go above that and into the positives, it might damage my speakers... Any thoughts about that?
The subwoofer (Hsu or Klipsch or whatever) is "active," not passive, meaning it has its own amplifier and gets its juice directly from a wall outlet. As such, it doesn't require any power from your AVR, which your fronts do. So assuming a decent crossover (say the standard 80 Hz), you're relieving your fronts of ULF duty and thereby relieving the AVR of the amount of juice it is sending there. So yes, in an indirect way, any subwoofer will lessen the strain on your L/R woofers.
The power issue (RMS wattage) can be deceiving. It is recommended to look at output
in dBs. Having the same Klipsch R120SW, I know it's 200 watts (400 peak) and capable of achieving 116 dB, but with an F3 of only 29 Hz. The Hsu uses more power (600/2000 watts), but it does so to enable its F3 of 17 Hz (1 port open), and that's what's important. I don't remember its max SPL in dB, but suffice it to say, it will destroy
the Klipsch on all levels. It's a bona fide beast of a sub, and levels beyond the Best Buy level stuff like the Klipsch.
As far as current output, I am with you there! The R120SW is certainly NO SLOUCH
when it comes to BOOM. For HT purposes, a single 120 in my 2300 cubic feet (open to another 2600 cubic feet in the kitchen!) shakes pictures and items on shelves, and that's with the gain set at ~1/3 and the AVR trim set at -8 dB! It's not a bad sub, especially on sale! But it can't compete with the low-tuned Hsu. You'll definitely benefit from that upgrade. I recommend starting with a single Hsu and buying a second once you've tried it out. I doubt you'll need the extra output (unless you're a bona fide AVS bass-hound), but the biggest benefit of dual subs is evening out the response between listening positions (assuming you're willing to invest in REW/UMIK-1).
One final note: the 120SW is fine for HT, I suppose, but it is boomy for music, lacking tightness. This also has an effect on HT, of course, but it's not as noticeable.