I have a SubOne, FWIW, and it is quiet as the tomb. It does bump on turn on, but I leave in on in standby, so it doesn't even do that. I have it in the front left corner, beyond my left main, and it is truly seamless (crossed over at about 10hz below the -3dB point of my mains). A very high value purchase even at full MSRP. I got my SubOne on a close out for about half, and it is ridiculously good for the money I paid. If you have a good deal on a SubTwo, I doubt you can do better at anywhere near the price.
NHT Sub Two Owners
At their closeout prices these subs seem like a steal for music. However, I haven't been able to actually hear them, so I'd like help from owners. 1) Do the units have any hum/hiss when the amp is active and no music is playing? If so, about how loud? 2)How difficult have you found to place themin your room for good response and speed? If you can compare to Paradigm Servo-15, REL Strata or Vandersteens it would be most helpful.