Hi Ethan and Jeff,
"Excellent, and I bet the ringing is greatly reduced too if you look at the waterfalls."
Yes the ringing is greatly reduced.
"Your spl range is a little too large. You might be better off changing your graph limits to 90db and 50db."
Yes, the scale is a little too large on the "After Traps" graph. It actually had to be that wide of a range to show you how bad it was before. Some of the nulls I had extended more than 40 db!
Anyway, I will re-post some graphs after I finish my room. As it is right now, I am using a total of 21 Bass traps. 17 of them are 6" burlap wrapped, Johns Manville I/S 300 panels. I am still using 4 of my original wood panel traps but as of today, have decided that they are causing more problems than they are helping. I removed them today and took a quick measurement and discovered that they were "seemingly" causing they large null at 80 Hz. Once I removed the panel traps, the null at 80 Hz went away completely. I have concluded that I must not have constructed them very well and that their position in my very tiny room was responsible for their failure to work correctly. I will be replacing them with 4 more 6" Johns Manville I/S 300 burlap wrapped traps.
As for my sub woofer, it is a Dynaudio BM 9S. I am not 100% convinced of the accuracy of the results in the 20-45 Hz range. The BM 9S bottom range only extends down to 30 Hz. I am using the ECM 8000 and an SPL Gold Mike mice pre to measure my room.
I will post some pictures of the "New Treatment" and some new measurements once I am done with my new broadband traps.
I will definitely turn it up a bit more now and will try flipping the phase.
Now that you mention that, I should play with the crossover on my sub a little. It does not have hard switches at dedicated frequencies for its x-over like my satellites do.
