Nht 2.5i's, 29Hz-25KHz +/- 3dB manufacturer spec. The speakers are biamped with NHT SA-2 amps which are fed with the front L/R signal and passed on to two channels of the 770 to power the upper portion of the mains. When running these tests I just turned down the amp feeding the lower section of the mains so that only the subs were playing. I did this to only hear the sub (I unplugged the other) while being fed the 60Hz tone in and out of phase. My thought (could be flawed so let me know if it is) was that a single speaker playing a single tone won't sound any different being in or out of phase since it's really not in or out of phase with anything else, and what I was noticing was the drastic change in SPL while listening to that one sub being fed a single frequency with the only change being phase. This only happens using the 6 channel input. The whole thing may mean nothing I was just looking for input from others on what they felt.



They are a pair of NHT SubTwoi's with a SubTwoi controller which is needed since the subs only have an RCA input to the built in amp. All control ie: phase HP, LP, LFE gain, volume and such are handled by this controller. Right now the controller is only acting as a volume control since all filters are set to bypass and it's only connected to the sub out from the 950. This link will give you a quick look. http://www.nhthifi.com/scripts/nhttech.c...ated=1062965377

I will try your suggestion with running the LFE directly from the DVD player and see how that works.