Well, I made a few measurements using a temporary enclosure for my V10. Here is a picture:
I mounted the enclosure so I could adjust the down angle, to see what impact, if any, it has on the frequency response and SPL in the listening area. I used Room EQ Wizard ("REW") with the microphone that came with my Denon receiver for use with Audyssey. I moved the microphone to each of 3 different listening positions, progressively farther from the test speaker. Recall that my room is pretty narrow, so there is only room for 2-3 chairs, with the outer chairs pretty close to the wall.
The frequency sweeps were not very informative to me. They may have shown a slight tendency for rolloff of the frequencies above 10kHz, at angles > 20-30 degrees, but I am not experienced enough with REW to make that claim. Next I tried Pink Noise, and this seemed to produce some repeatable numbers. I charted the results in MS Excel:
Down Angle refers to the angle of the speaker from vertical. For example, in the photo above, the speaker is tilted down 20 degrees.
The reason I performed these measurements was that I was having a hard time perceiving a stereo image with these speakers mounted above my head. I suspect it is related to some psychacoustic phenomena of localization and our perception of sound from above and to our sides...
Anyway, based on the above, can you make any informed observations related to speaker angle and Time-Intensity-Trading and my quest for the perfect surround image?
Thanks in advance,