I might add, I was skeptical about my low extension, but I don't think it freakin matters because I have 400 sq. inches of cone area and 133.5 sq. inches of port area. 45-70hz is just sickening, but it still gets loud as hell around 32-39hz. It's a different type of bass though, the SQ is perfectly fine, but it seems more agressive than my 9500s. Songs hit so hard i feel my lungs vibrate, lol.