UPDATED Ok I did a bunch of sweeps on various drivers yesterday.
among them TAD TL-1603's, JBL 2225, JBL 2245 in 4645 cab, and of course Eminence Lab 12's in my BS-212 Cabs.
Test setup:
TEF 20
Old P2 Laptop running SL 6.7.9.4
Alesis Matica 900 Bridged Mono
Fluke DMM
Crown XXX omni microphone placed 32.8' away from speakers hovering ~ 2" off the ground.
Issues:
I Didn't have calibration data for mic until last test. Volts per pascal was set at default .01 and needed to be .011. The final test was the JBL 2225's. I tried changing these values under "current settings" it seemed to make about .5dB difference
but I seem to be measuring ~5-6dB more than predicted. If anyone knows how I can make those corrections after the fact it would be greatly appreciated.
I Corrected This Using Calculation tools at http://www.sengpielaudio.com/calculator-soundlevel.htmThis site was very helpful.
I am not sure at what the high cut should be doing a 1/2 space ground plane measurements. Everything things to start rolling off in the low mid 100's.
Here is an overlay of four cabs tested:
I'm not sure How Bass Box determines its Normalize Amplitude 0dB point but it claims I'm at 0dB around 43Hz -7dB around 20Hz and +1.5 around 100Hz. I'm measuring (6Hz resolution) -6dB @20Hz relative to 43Hz and +4.4dB @100Hz. I guess that would actually put me ~-10dB @20Hz. I'm wondering if getting 3dB more than predicted @ 100Hz has something to do with the dimensions of the two cabs being about 3.5'X4'???
More to follow
Antone-
Update the 2225 sweep says 8 Ohms at 20VRMS this is incorrect it was two drivers in parallel so 4 Ohms @ 20VRMS.
The 4Labs were wired in series parallel so 6 Ohms @ 24.5VRMS.
I tried to keep everything @ 100Watts @ rated Z.