It is shown as down to 18Hz in room at -9dB. I doubt you will get much "usuable" bass that low, and also depends on the room. The anechoic +/- 3dB rating of 28Hz would be a better spec to use for comparisons, with maybe useful in room response to about 25Hz.

-Dave

M80s VP150 QS8s EP500s
ravenmanor.com/cinema/