Power amplifiers are unglamorous but essential. In theory, they have only one task. But, according to audio sage Yogi Berra, "in theory, theory and practice are the same. In practice, they are not." Amplifiers must take a voltage input signal and provide an output of somewhat higher voltage but of substantially higher current, the product of which is power. The task is complex in that this output must be applied to electrical interfaces whose characteristics vary widely from speaker to speaker—across the audioband and, for some, even at different power levels. There are no control mechanisms or feedback signals to help. The power amp must just stand and deliver.

He was a victim of his own success. From 1925 to 1929, when he was in his mid-20s, Louis Armstrong changed the world of jazz music forever with his Hot Five and Hot Seven recordings, and his solos in tunes like "Cornet Chop Suey," "Potato Head Blues," and "West End Blues." Almost immediately, however, he was faced with a question: Now what?

Debussy: Three Nocturnes; Jeux
Concertgebouw Orchestra of Amsterdam, Bernard Haitink conducting.
Philips ACD 400-023-2 (CD).

This is the first classical CD I have heard that was originally mastered on analog tape, and the sound is quite different from what I'm accustomed to hearing from the silver discs.

I had read so many critics' complaints about excessive background (tape) hiss from analog-mastered CDs that I was fully prepared to be appalled. I wasn't. Perhaps my speakers (Watkins WE-1s as of now) are smoother than what some other critics listen to, perhaps I prefer a more subdued high end than some, but I did not find hiss to be a problem with this Philips disc. Yes, it is audible at high listening levels, but it is not a ssss, it is a hhhh, like the sound of a very gentle rain far off in the background. I have heard worse hiss from microphone preamps.

Toronto is turning into a happening place for audiophiles. The Toronto Audio Visual Entertainment Show being held October31–November 2, 2014, promises to be bigger and better in their new venue at the Sheraton Centre Hotel downtown. The Update TV & Stereo Elevated store, with a strong high-performance audio orientation, opened last spring in the Toronto suburb of Unionville. And now, Angie's Audio Corner, devoted to high end celebrated its second anniversary with the opening of the Annex Clearance Center in the coach house next to the main building, acting as a clearing house for used equipment of all sorts and used LPs.

A highlight for Stereophile editor John Atkinson at the 2014 Consumer Electronics Show last January was auditioning GoldenEar’s new Triton One tower loudspeaker, which costs $4999.98/pair. On September 4, from 6–9pm, GoldenEar founder Sandy Gross will be presenting the Triton Ones at Gramophone, 8880 McGaw Road, Columbia MD 21045.

There are records where one look at the cover art and without listening to a note, you know exactly what’s inside.