which is why I walked all around through the room, and through the kitchen behind the room, and through the entry room to the side. We played about 15 minutes of demo clips, movies and music, and while I was walking around I didn't hear hotspotting, or big nulls/modes at least to the ear. I have an omnimic, but this was just a unplanned quick and dirty showing he offered to get my opinion. I'll go back later and measure and see exactly what we are dealing with. I'd also like to go over his source equipment settings with a fine toothed comb. Some sort of LFC or night mode may be engaged possibly too on the player or the AVR.
This isn't it's final resting place. He just threw it in the living room to turn it on for a first go and see what she would do before installing it in the theater room. He asked me to swing by because he felt a little underwhelmed with the output. Again it sounded really good, and I think Michael's anticipation of how loud it was realistically going to be was perhaps exaggerated over what is fair and realistic for a single driver -- yet at the same time, I too walked away slightly baffled by the seemingly low output levels — especially based on the NX6000D showing input and output levels nearing clipping point, and the driver excursion levels visually hitting about like I'd expect. This at the couch, the cabinet, or walking around the room.
I have no experience with the NX6000D amps, but I'm assuming they should be very similar to my iNuke DSP 6000 amps that I have plenty of experience with.
I also have eight, UM18-22 in sealed boxes, and am plenty used to crazy capable bass systems, so I'll admit that without my calibrated mic, it's just a simple subjective impression that holds no real weight. I told Michael I could bring my mic back tomorrow or wednesday and get some objective data.
When I went over he had the subwoofer channel trim at +10
I turned that down to 0 (told him it really should be -3 or less ideally), and then kept turning the input attenuator knob up on channel A of the amplifier (seeking more SPL output) until it was absolutely maxed out, and while the DSP software showed it was uniformly nearly clipping/occasionally flashing red -- it just didn't subjectively seem that loud. Luckily he has 4 of the cabinets.
-- three more to build.
More objective testing at his place is needed to shore this up...