I just uploaded another PRIR measurement from a local hi-fi store. I tried to get him to let me do more than one room, but he said I could come back another day. Oh well, at least I got to measure one room.
I had a strange issue with the initial PRIR being very rolled off in the high end much like my previous PRIR attempt. It was so apparent that I thought something might be wrong with my microphones. I then did another measurement, but did a new mic insertion. The second time, the sound was completely different. The highs were much closer to the real thing.
Unfortunately with my 2nd attempt, for some reason the Realiser changed to pilot mode instead of azimuth mode. I was finding that the settings changed back to some sort of default even though I never changed them. Weird. I had to go back and recheck all the settings like switching from 3 second sweeps to 12 second sweeps, etc.
So I did a 3rd mic insertion and measurement. This time everything worked beautifully.
I took pictures of my ears for all three mic insertions and after reviewing the photos, I can't tell any significant differences from one to the other. I am still at a loss as to the difference in the PRIR's.
Hold on, I just realized that I did make a significant change from measurement 1 to 2. When I took the mics out after measurement 1, I heard some 60 cycle ground loop hum. I was going from the Realiser output to the pre-amp using long unbalanced RCA cables. To eliminate the hum, I then switched to a much shorter RCA cable and went into a unbalanced to balanced active line level converter box so I could go into the preamp via balanced audio cables. This worked and there was no longer any trace of hum or noise.
I am not sure if that made the difference or not, but I am guessing so. It could also be my long (25ft) unbalanced RCA cable that might be causing audio problems. I didn't have time to check the sound of the actual speakers using my long cables and the unbalanced input on the preamp.
Anyway, the PRIR file and info is in the Dropbox folder : "Darinf/Stereo Unlimited Sonus Faber 2.0"
Here's the info for the system:
I have not had a chance to listen to it at length, but from initial impressions, I think I may have a new favorite PRIR... Not as much bass as the Audio Revelation/Magico's, but still great sounding.
Let me know what you think.
P.S. Now after listening and comparing this PRIR to the Audio Revelation PRIR, I think I like this one better. I don't know if I got lucky, or the speakers were just that good.
I also picked up a pair of Koss PortaPro's and modified them with the Kramer mod. I am blown away by the sound especially when you factor in the fact that I paid $40 for them! I think they will work well enough to bring them when I do PRIR measurements instead of the Stax. They are good enough to determine if I have a good PRIR or not.
Edited by darinf - 9/29/12 at 2:17am