Which subwoofer?


I have a small room (10’x14’) and am wondering if a subwoofer would help. If so, which one?

I have Martin Logan electrostatic speakers with  8” powered 200 watt woofers and 8” passive radiators.  The bass is articulate, but not very deep. I am wondering if I could get more bass volume and depth without loosing detail with an additional subwoofer?
I have tried an 8” Velodyne, but could never integrate it with the Martin Logans so I sold it. 

The Martin Logans are powered by a 200 watt McIntosh receiver. 
Any thoughts?


kenrus
The new x series from REL are incredible. Check out my T/7x review on their website www.rel.net 
I agree about looking at REL.  They are the first subs that integrate with my Maggie 3.7s.  Very fast and great quality.
Two Rel T5i's, a Rel T7x and a SVS SB2000. Fixed 90% of my low frequency issues.
@bdp24 
Danny Richie uses a pair of OB subs in the front of his room and a pair of F12G's in the rear (in both his company's listening room and at hi-fi shows), the F12's in phase opposite that of the the OB's. I believe he uses 40Hz as the x/o frequency between OB and F12.

This is great to know! So he's using F12s up to 40Hz. Do you happen to know how high he crosses over the F12Gs?I guess I have some chewing to do: I run F12s to 65Hz and from there unbaffled dipole 18", so kind of similar to Danny, but he has servo dipoles above the F12s. 
@oldhvymec
Not familiar with what VMPSs bass is. I believe you are also into DIY OB speakers. I'm also running an active system, so no passive xo parts between amp and corresponding driver. I couldn't be happier. Currently a 4-way active stereo system...although I smell bdp24 comments might be leading me to a 5-way ;-)