I only heard the original Crescendo at RMAF 2007 powered by a pair of Halcro DM58 amps. The bass in that setup with Robert's program material was the hardest hitting, most concussive bass I've heard from any speaker. Very impressive! The overall sound was damn fine as well.
Most of the show reports since then list Triode labs amps which may not have the power of the Halcro's. That might explain the other responders opinion but who knows.
Most of the show reports since then list Triode labs amps which may not have the power of the Halcro's. That might explain the other responders opinion but who knows.