First impression, Magnepan UBS subwoofer, in a Montreal group. - YouTube
Magnepan
Truth, my life was changed after getting these subwoofers. Gr research open baffle servo sub with magnepan 1.6qr. (Also with the gr research crossover) seem less transition between them, unless you want
VPE Electrodynamics Little Dipole Woofer Model 1 with Magna Riser Airborne Stand Review - HomeTheaterHifi.com
Magnepan DWM Planar Magnetic Bass Panel Speaker - The Music Room