subwoofer question......what size sub ?

Vandersteen Sub 3 coming soon
advantages
• no DSP processor in your analog circuits.                                 •installs at speaker level ensures
Better transition with existing amp.

•11 band tunable with built in room
compensation deals with room peaks without over compensating 
Sealed system with proven speed.
•Works with all Vandersteen feed forward High Pass units unloading existing amp from heavy lifting 
allowing the whole system to play with better transparency and clarity.
JohnnyR