Wes Phillips & Jon Iverson

Single-Ended Ecstasy

We were once again impressed by how un-hi-fi the sound in the deHavilland room was, this time in conjunction with a pair of Tannoy Prestiges. The $10,000/pair 50W deHavilland GM-70 single-ended triode is pure class-A, with zero negative feedback. The GM-70's directly-heated triode vacuum tube is said to be the largest output triode available today. We found the sound sweet, but surprisingly detailed and dynamic. Fit'n'finish were superb.

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Behold!

Behold bills itself as "true digital audio" since it maintains audio as a digital signal up to the amplifier stage. The 600Wpc BPA768 (US price TBD) incorporates 768kHz/24-bit signal processing, a switch-mode power supply, an analog output stage, and an integrated power conditioner.

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Some Things You Can Just Count On

Many of the best-sounding rooms at the show employed Ayre's $16,500/pair 300W MX-R monoblock amplifiers. Yes, they look small enough to be class-D amplifiers, but they're pure analog. How'd they do it? The entire enclosure is the heatsink and Ayre's Charlie Hansen designed a special low-rise transformer, used in pairs, to keep the chassis so compact.

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Baby Pictures

The 150Wpc Boulder 865 integrated amplifier (approximately $10,000) is only four days old, so we tiptoed into the room in order not to wake it up. Richard Maez (seen here at the back of the photo) was elated that the 865 had actually made it to the show, but he was even happier to run down the details.

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