Trenner & Friedl Isis

The price of the Duke loudspeaker from Trenner & Friedl—$175,000/pair—took my breath away when I heard it at the 2011 CES. The Austrian company’s Isis ($40,000/pair), on display in Profundo's second room, uses the same compression driver for the HF as the Duke but combines it with an 8" paper-cone midrange unit and a 15" paper-cone woofer in a conventional, if large, cabinet. (Each cone is doped with six coats of lacquer.) The sound of Saint-Saëns’ Danse Macabre, from the Witches’ Brew RCA LP on a Basis turntable, with the speakers driven by Viva Audio Aurora tube monoblocks ($43,500/pair), had huge dynamics and a natural tonal balance. The image of the solo oboe that represents the cock crow at dawn in this work was superbly well-defined, without any exaggeration of its size.
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