Robert Deutsch

Although PS Audio's Stellar M700 monoblock power amplifier ($2998/pair) is a brand-new design from a team led by engineer Darren Myers, it draws on the company's extensive experience with class-D amplification. Sam Tellig and Kalman Rubinson reviewed PSA's HCA-2 power amp in, respectively, the October and December 2002 issues, and I reviewed their GCC-100 integrated amp in January 2006. The Stellar M700's input stage is the latest version of PS Audio's Gain Cell, which they describe as a "proprietary, fully differential, zero feedback, discrete, class-A MOSFET circuit.

If you do a Google search for "loudspeaker" combined with "full-range," "line source," "one-way," and "modular," you'll get results that match some, but not all, of the characteristics of the Ruel Audio R7. The Audience ClearAudient 16+16 comes the closest, with 16 drivers firing forward and 16 to the back, but its small full-range drivers are supplemented with eight 6x9" passive radiators, and it does not have modular construction. Plus, it appears not to be in production. For that matter, Google misses Ruel, but it has been granted a provisional patent.

The first time I heard a CD player in my own system was in 1983, the first year of the format's introduction in the West. CD players were generally hard to come by, but I had a friend who worked for Sony, and he came over with his new toy: Sony's next-to-top-of-the-line CD player. (I think it was a CDP-501.) We connected it to my system—at the time, Quad ESLs driven by a Luxman tube amplifier, with a Linn turntable—and listened to some Sony demo CDs.

One never knows, do one? Within the past year, I've had six preamplifiers in my system for critical evaluation, reviewing four of them and using another two as references. I was getting pretty tired of listening for sonic differences among preamps, and I told JA that I'd prefer my next reviewing assignment to be something different, like a speaker or a power amp. He agreed, but said he'd first like me to review just one more preamp, the Perfectionist Audio CPR/TIPS, which had been waiting patiently in the review queue in Santa Fe. Well, one more wouldn't hurt. Sounded kind of interesting, anyway: a preamp with a battery-operated power supply!