Desertdome came over and we measured the Seaton/MCCA Modified Dayton SA-1000 that Kevin (Sandbagger) sent for the Omaha GTG in October. We never got to test that amp with the dual opposed since we ran out of time.
We also ran the numbers on the Dayton SA-1000 that is unmodded and compared the two.
Equipment used was the same as from the Omaha GTG. The Steinberg and ECM8000 calibrated by CSL to 5hz. J River Media Center was used for applying the REW filters and L/T, etc. We placed the ECM8000 in the same position as the October GTG, so if you want to go back and look at how the room looks from that mic standpoint, you can.
Link to description of EQ from Omaha GTG. SubFest 2011 EQ Methods
I think I'm eventually going to get rid of my Onkyo and use one of Desertdome's Steinbergs and J River. J River is a powerful tool, and the more I see its uses I don't think anything is as easy or seamless to use and apply filters. That and REW are quite the match.
It just doesn't run Height channels. Boo.
It is pretty cool what you can do if you are into EQ and can use REW and J River and apply filters and tweak. In 30 minutes you can copy the hours of work I'm sure it took Mark or Kevin to modify the SA1000.
BUT, say you don't have that capability or feel like doing that.
The modded SA1000 is a nice option for those DIYs that have all of those MFW-15 drivers in boxes. For a bit of an upcharge you can buy a modded amp like this.
This might be an option for CHT owners of the 18.1/18.2. I wonder with their experience with the SA-1000 if they could mod the amp to help owners out there for an even better response---or any other amps in general?
Could be a cool service.
The graphs are pretty self-explanatory, Seaton and Dayton close mics taken from the same dual opposed, 1 inch from dustcap. Room is with the mic in the position from the Omaha GTG, LT as applied by J River (adjusted using RTA), and EQ utilizing filters as suggested by REW.
Desertdome please add things I screwed up.
If anyone wants different overlays let me know.