Doug:

Oh...also, I'm not using a RS SPL meter. I actually have a digital RS SPL meter that I had an EE friend solder some resistors and stuff into per an internet fix to get more accurate bass readings.

What I used for the above tests was a Behringer ECM8000 mic - basically ruler flat measuring response from 20Hz to 20kHz. It's hooked to my DEQ2496 which has an SPL meter.