In conversation with Bonnie Raitt these days, one word continually jumps out: groove. She's speaking of her music, of course, but the blues singer and guitarist—her gifts as commanding as ever on her latest, Dig In Deep—has also survived some family struggles in the past decade that nearly forced her out of her personal groove.

Our mail, in recent months, has brought a number of comments (some of them printed in this issue) from professional audio men who decry the fact that developments in the audio field seem to have come to a screeching halt.

There would seem to be some justification for believing this, too. There hasn't been a new kind of loudspeaker, amplifier, pickup, or tuner for the past five years or so. The professional engineering journals, once loaded with juicy articles about research and developments in music reproduction, are now devoted largely to public-address techniques and new methods for the "creation" of electronic music.

The night before I started to write this review, PBS began a five-part series on computers called "The Machine that Changed the World." The first episode described the development of the ENIAC (Electronic Numerical Integrator and Accumulator), the first electronic computer. The ENIAC used 18,000 vacuum tubes, had over 500,000 solder joints, required a room 30' by 50', had to be physically reprogrammed with patch cords to perform different tasks, and packed less computing power than today's $4.99 pocket calculator.

Saturday April 9, from noon until 5pm, Metro Washington DC's Command Performance (115 Park Avenue, Suite #2 in Falls Church, VA) welcomes Kazutoshi Yamada and Eric Pheils of Zanden Audio for a special event. Mr. Yamada and Mr. Pheils will premier Zanden's flagship electronics: the Mk.II versions of the Model 9600 KR845 monoblock amplifiers (above) and the Model 3000 preamplifier.