Thanks for the detailed reply. I will try to respond to your points in order.
1. The Yamaha would let me configure a 6.1 set-up manually, but when I switched back to YPAO, it gave me error messages and stopped the test when it could not find the seventh speaker. It did this whether or not that speaker was connected. The speaker did not output sufficient volume for the 7.1 test to work, and it did not seem to have a 6.1 automatic option.
Does YPAO function as some sort of a parametric equalizer, or does it only adjust relative volume levels amongst the speakers?
I should have the seventh speaker back before my weekend visit to the cabin, and hopefully at least this problem will take care of itself.
2. Speaker placement - I posted an earlier forum question on 7.1 speaker placement and was provided a diagram showing appropriate speaker geometry. I am pretty confident I got the angles right, or at least within the suggested range.
3. I have not done anything for room treatment. I think the room is relatively 'dead.' It is in a basement, so the floor is concrete. There is carpet over the concrete, and the area between the sofa and the mains has a heavy area rug as well. The walls are also concrete, and they are covered with 30s style knotty pine planking. The ceiling is a bit irregular, as described before.
I do not really know anything about room treatment, but I do know the room sounds pretty good when a BD disc is playing.
4. Source material - All old school conventional CDs. No video, no HDCD. The only title I can recall off the top of my head is the The Who - View to a Backstage Pass which consists of a series of live concert recordings covering several decades. Sound quality is limited by the various original masters, but given that it is a semi-recent release, I do not think that it is especially compressed. Recording quality is probably similar to Live at Leeds, which at least sounded good on vinyl, all those years ago.
It being the The Who, I had no choice but to turn it up
, but it just did not sound all that "live." It sounds more like a decent quality table radio than what should be expected from relatively full range speakers with 200 wpc amplification; especially when they are backed up by a truly fine subwoofer like the SVS.
5. Connections - HDMI throughout. I left one component out of the previous description. I have three HDMI sources (cable box, BD, and Roku2), whereas my AVR has only two HDMI inputs. Accordingly, I feed the BD and the Roku to a Monoprice switchbox when then feeds into one of the AVRs HDMI inputs.
6. HF loss - This one just does not make sense to me. The test disc has a couple of different frequencies between 10Khz and 20Khz, and the brand new mike does not pick up any of them. I am having trouble imagining an electronics failure that affects only the high frequencies, and likewise the idea that all of the speakers would have frequency failures like this does not work for me either. Then again, if I really did rule out all the possibilities, then the sound would be there, wouldn't it?
7. LFE Management - All of the speakers are set to small, with all signals below 80Hz sent to the sub, which the maker suggests setting at 80Hz as well. I think I need to play around with this some more, as there is a good chance I am missing something obvious that is taking the sub out of the two channel picture.
Again, all of your suggestions are much appreciated.