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Power amplifiers fascinate me. In the past 15 years I've helped design and build over a dozen advanced models, with output powers ranging from 50 to 2500W, for a number of the UK's professional equipment manufacturers. To learn from others' ideas and mistakes, I've also repaired, measured, used, and reviewed hundreds of makes of amplifier. My experiences have led me to regard the power amplifier as one of the messiest, most imperfect pieces of electronic equipment in the record/replay path.

99% True: Almost a National Bestseller, by Paul McGowan. Lioncrest Publishing, 2019. 364pp. $25.00, hard cover; $15.99, paperback; $9.99, Kindle e-book.

To many audiophiles, high-end audio manufacturers must seem like monolithic entities, enduring for what seems like forever, like cliffs beside a familiar path. But as Paul McGowan explains in this unputdownable autobiography (footnote 1), behind the facade of stability things can be in financial turmoil, with success equally as risky as failure.

Audio Vision SF, one of San Francisco’s two major high-end dealerships, celebrated its 20th anniversary on September 27–29 with a three-day celebration in two locations.

The Vivaldi—the four-box flagship product from digital audio specialists dCS—is, in my opinion, misnamed. Vivaldi the composer was an asthmatic priest who worked in an orphanage for 30 years and died in poverty. The Vivaldi stack dedicates four separate products to converting into music digital code stored on silver discs (although you can play music—very well I am sure—on just one box, the Vivaldi DAC, footnote 1). Together, those boxes weigh about 148lb and cost some $115,000. The most expensive is the CD/SACD transport; leave that off and you can save 51lb and $42,000.