Wow, just found this thread; looks like I have a lot of reading to do!
Anyway, I was doing a sub crawl using the mic and took some REW measurements today. However, that was before I found this thread. So my measurements don't fit the standard (eg: waterfall graphs are only up to 75dB, and only measured 10-120Hz).
But I'll post them anyway. I understand of course that these graphs may not tell me anything because I didn't measure it properly, but with a newborn, the ability to do measurements (especially up to 100db) would be very infrequent!
Some other info:
- Graphs are with Audyssey OFF
- The noise floor is indeed ~40dB in that room, so I didn't make the waterfall plots go below 40dB
- I did the sweeps with all speakers and subwoofer combined (not like what was recommended, at least for the frequency response in this thread)
- Crossover to the sub is 80Hz
- One sub, SVS PB-12 Plus
1) Which of the three would be the best placement for the sub? (with the caveat that I didn't generate the graphs completely properly)
2) How do you generate an ETC graph? Not sure if it was posted earlier, as I've only had time to read the first 5 pages of the thread, but any links to a post containing the info would be appreciated. Or the info itself...
3) The SVS PB-12 Plus has parametric EQ--is it better to try to nullify peaks/troughs in the frequency response curves first using parametric EQ before Audyssey, or try to do it after Audyssey on what could not be corrected adequately?
4) Does decay matter much for the frequencies below 20Hz, considering they are mostly inaudible? I would imagine that "muddying" of the frequencies which are felt rather than heard don't really matter.
5) How do you make REW play a sweep at a higher dB level to average around 100Hz across the frequency response to generate a proper waterfall graph?Edited by beezar - 1/21/13 at 8:23pm