Velodyne or Mini/Micro Vee for 2-ch music?

Anyone has any opinion on this sub for use in a 2-channel music set up?
I have no personal experience with either, but you'd have to have very small drivers in your main speakers, have a small room and listen at low levels for either of these to be of much use. The measurements of the Micro Vee bear this out. There's no reason to expect the Mini to be much better. They are simply too small.

I've used an 8" M&K sub for years in my office system and it was adequate at low office levels. Increase the level much at all and it became obvious the sub was too small.
Sorry, I forgot to suggest the SVS SB12-Plus if you need a small box. This is the sub I now use in my office system - 12" driver, sealed box.