Acoustic Zen’s Crescendo

The San Diego manufacturer’s affable Robert Lee was showing his new Crescendo loudspeaker ($16,000/pair), which combines a horn-loaded ribbon tweeter with two 5" midrange units and two 8" woofers in a transmission-line enclosure. Driven by Triode TRX-M845 tubed monoblocks, the Crescendos threw a very wide but somewhat unstable stereo image on a 1962 RCA “Living Stereo” Leopold Stokowksi LP, with rather ill-defined low frequencies. I would have thought that perhaps that sonic signature was due to the recording, but the Crescendos sounded cleaner, with better defined low frequencies and accurate, stable stereo imaging in the Red Dragon Audio room (below), where they were driven by Red Dragon M500 Mk.II monoblocks ($1598/pair) and helped, I understand, by DSP room acoustic correction.

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