The NSR Sonic Research D3 Concerto Sonata loudspeaker ($4495/pair) was reportedly making a lot of waves at its world premiere. Displayed in not completely broken-in prototype form, with tweaking of crossover and capacitors still to come, the speaker is claimed to have 93.7dB sensitivity. The bottom of the enclosure features an exclusive "Acoustic Projection Lens." The lens, developed over the course of 30 years by its guitarist/luthier/locomotive engineer designer, is claimed to act as a sonic prism that overcomes randomly generated frequencies. The company also offers the much larger D1 Concerto Reference ($32,000/pair). Both speakers have back panels that intentionally resonate like an instrument, a feature that JA points out was first seen in the controversial Bösendorfer loudspeakers.

Lots of folks were wowed by the D3 at RMAF. I look forward to making further acquaintance with the finished product.