Subwoofer Calibration

[Marathonman777]

I am using REW to calibrate my subwoofers before I calibrate the other speakers. When checking levels on sub at 20-250 Hz, I get 95 dB. At 20-22k Hz, I get 65 dB. My FR/FL/C Definitive Technology speakers that each include a subwoofer. I have the volume on these turned way down. Should the readings be this far apart?

 

[John Mulcahy]

Yes, the level check signal for a measurement up to 22 kHz is not intended for checking a sub level because a sub will not have output at such frequencies.