The driver works well down to 35-40hz but is clean sounding. Maybe you want a small subwoofer with it? Up to you but I have been liking a nice tight midbass driver with a subwoofer for a tiny bit of low end, over the likes of a single woofer that reaches the lower frequencies. I find more often than not the sound gets muddied and I would rather live with out the strong 20-35hz.

I'm going to try some of the BMS 12" and 15" this summer and see how they sound. They advertise a triple shorting rings with Neo magnets and good specs. have to see when they arrive.