Subwoofers

I have a single Depth, and find it to be the best I've used
with my (electrostatic) CLSs, for the following reasons:

Incredibly fast transients, which you'd better have if using a sub with electrostatics (better than the Descent IMO)

Very tolerant of placement (probably due to the omnidirectional radiating pattern, but that's just a guess on my part.) Very hard to hear where they are (a good thing) so two are really not required, unless for HT effects I suppose.

Very easy to dial-in to your room and main speakers.

My experience with other makes: Velodyne (really suck!), Hsu (OK budget sub for HT), Kinergetics towers for the CLS (hated them, but they looked good!) Wilson Puppy 2s (incredible as subs, but required electonic crossover and another stereo amp -- too much stuff)

Have no listening knowledge of the Vandy or Rel, but am aware of their good reputations, so they'd be worth comparing. What attracted me to the Logans was the innovative solution to eliminating cabinet resonances, and the uniform radiating pattern. Also, FWIW, I've never heard a downfiring sub that I liked.

Dam Nsgarch, as much as I appreciate your post, it’s your dam fault I'm in this predicament!!! I was prepared to buy the Rel but read your post on the Martin Logan (nice system by the way) that made me think about the Depth. Given your experience and taste in gear, the ML seems like a good piece. It would be a little cheaper than the Rel, so that’s also a perk. ML’s website does a good job bragging on the Descent and describing the servo control system, which is not mentioned for the Depth. Is that poor marketing or not a feature on the Depth? Anyway, thanks again for the post, now go away;)

I agree that the ML is as good as the reviews say and owners also. It is very fast and musical with great punch- very hard to pull off these at the same time though it does not dissapear like the other two. Rel is musical but not powerful sounding-perfect for many but it goes for depth and pitch over power. It is better for full range speakers. Vandersteens are also pitch perfect and tunefull- they dissapear the best of the three. But also are better with full range speakers just augmenting the lowest notes but not adding any dynamics to the system. All three are set up differently so that is a point to look into before you buy. Don't discount the vandi price- it's total quality and the one I would go with of the three.