Niagra ($54,000 per pair)

The top-of-the-line Niagra speaker from French manufacturer Waterfall Audio is a thing of audio and aesthetic beauty. Each speaker includes two separate enclosures, both of which are made entirely of 15-mm-thick glass. This design acoustically isolates the horn tweeter, which is equipped with its own crossover, from the mid-range and bass drivers in the lower portion of the cabinet. The tweeter peaks at 28 kHz, while the lower-frequency drivers—dual seven-inch drivers for the mid range, plus a larger lone down-firing woofer at the foot of the cabinet—bottom out at a clean and precise 36 Hz. The Niagra speakers look and sound magnificent. (854.569.0184, www.waterfallaudio.com)

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