Excellent subwoofer. Does what it claims to do, no audible distortion at high excursions. I can push it to the max and it just sounds the same as low volumes, clean and tight. I also own a CSS SDX 12 to compare. I like this slightly better, has just a little more top end punch. Both are really excellent drivers though. I'm using it for home theater and music in a 1.8 cu. ft. enclosure tuned to 25 hz with passive radiator. It's amazing how much clean low bass comes out of such a tiny box. Nice flat frequency response, hits hard, no distortion. These drivers cost a lot but you get what you pay for!