True 'kura-style concrete sub (Trademe)

[N4CR]

http://www.trademe.co.nz/electronics-photography/home-audio/speakers-and-stands/subs/auction-104698273.htm

now that's a 'solid' sub..

on another note... wtb some dm602's/308's or similar warfe's or similar brand/quality floorstanders if anyone has any!

[riffer]

I'm not sure how well it would mount to the back of the bike.

Does it come with mounting brackets? :mellow:

[The Pastor]

wtf...............

[Ocean1]

Had me going there.
Thought you were on about this:

http://environment.newscientist.com/channel/earth/deep-sea/mg17323334.600