This is the only forum I could thing to post at since people here have the drivers to appreciate it, and possibly the equipment to measure it as well. Black Hawk Down. Ok, I am sure most of you have seen this and can appreciate the killter audio track. ...and most of you with good subs can have some fun with the helicopter with an ~18hz rumble. (ok...if you have an ok "sub"...you can only get the ~30hz overtone ) ...but am I the only one to notice the low beyond belief sub-sub bass? Boot up the DVD and go to 35min 20sec. This is right when the Helicopters start up to head into Mogedishu (sp?) and a pilot says "f*&en Irene". My 12" HE sealed system is dancing on what looks to be 3-5hz ultra-sub-bass!!!!!! If you are running on an amp with a rumble filter, you probably will not "experience" this. I hae TrueRTA and this is below its 10hz low end, though I can see the start of a hill there. Does anyone have the tools to measure below 10hz?