I've finally had the time to run some measurements on my dual F12s in my 2700 cf^3 room.
I find the results of the crossover tests particularly interesting, due to the results of YPAO, Audyssey & Brian's Subtuner as they seem to be in agreement of the distance each come up with of the F12s.
YPAO says 8.4ft, Audyssey says 8.4ft, Subtuner says 8.2ft. The subs are the same physical distance from the LP as the mains, and the mains are 7.6ft from the LP which YPAO & Audyssey get correct.
All this talk is boring though, isn't it? Let me put up some pretty graphs to break the monotony. Let me first just add I measured in .2 ft increments over a 2 ft distance, from 7ft to 9ft. The crossover is 100Hz
, no smoothing has been applied. Like I said before, the results are interesting to me, or perhaps I'm just ignorant:7ft7.2ft7.4ft7.6ft7.8ft8ft8.2ft8.4ft8.6ft8.8ft9ftAll measurements
I will first say that all measurements were done at the same volume over a period of 15 minutes. I never changed the volume between measurements, I only changed the distance each time.
I know that by simply listening by ear the difference in perceived output from the subs by simply changing the distance setting in the AVR. In this case, the CO points that YPAO, Audyssey & Subtuner landed on seemed to have the most output, but an obvious hole at the CO at the LP. For my eyes, the 7ft distance setting produces the best result, much better than the almost unanimous 8.2/4ft setting.
My next tests will be with my ears of course, but in the meantime I thought I'd get some feedback on the measurements.
Perhaps the automatic measurement programs aren't always right