This question is probably for you gonk as I know you are using the Velodyne system for bass equalization. After having ignored my R-DES (Onix bass equalization system) for a few month I decided it's time to give this a try:
The manual states that all full range speakers should be disconnected before running the test CD with sinus frequncies ranging from 16 to 120 Hz. So to run the test I did not change the settings in the 990 menue and simply turned off the M2200 that power the speaker. I set the gain control on the sub (PBS12/+2) to ~60% and either set the crossover control to disables or enabled with the crossover frequency set to 150 Hz. I used a digital Radio Shak SPL meter set to slow response and C-weighting.

In general I just want to know if this is the correct way to do this?

The curves show a response ~85dB (some dips and spikes) but then fall off rapidly above 80 Hz and drop to ~63dB at 106 - 120 Hz. (Pink noise SPL was set to 74 dB prior to bass frequency intensity recording.)

Please let me know if this sounds strange to or if I missed a significant point in he set up. Thanks!