http://www.youtube.com/watch?v=uQ2pkmISOLM

With my main speakers it is heard like a gun shot or something. I turned them off.

Subwoofer-wise, pretty much nothing with my 300W 10 incher . The cone barelly moves, I think it tries to reproduce ~10 Hz .

There's a small delay between the sonic boom and the actual bang that is heared.

When the video is shown at half speed the sub resurrects from the dead ...

Knock yourself out with the frequency graph.

Oh, the graphs at the bottom don’t pay attention to that its the one above I was looking at the third one above that is the slow sonic boom. Anyway onto bigger things now!

http://www.avsforum.com/avs-vb/attachment.php?attachmentid=124702&stc=1&d=1227096297

The video is so much compressed, how can anyone get any decent sound quality from it in the first place?

Even if you have the direct raw footage, I'd make sure the cam is a good pro cam + good external mic before even attempting to audition anything. :D

WTF... nothing below 20 Hz ??

Yeah, the recording is probably ****.

WTF... nothing below 20 Hz ??

Yeah, the recording is probably ****.

Yeah what you see is what you get; I’d say that is good enough.

Why not look though these (Earthquake frequencies)! I’m rather busy right now don’t have time to play with youtube.
http://uk.youtube.com/results?search_query=earthquake+frequency&search_type=&aq=0&oq=earthquake+freq

Space Shuttle Launch
http://uk.youtube.com/watch?v=Gn5odETw3Yc
This definitely has lower content.