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Stuart: In the MCD there are separate regulated supplies for the servo, the digital, and the audio sections, but they share a common transformer and grounding system. In the Pro, the supplies for the servo and the D/A and audio section are completely separate. And we isolate the audio section from the RF section, which reduces the level of spurious ultrasonic material by at least 18dB.

Holt: You mean, much of that ultrasonic garbage was the result of electrical interference from the digital circuitry into the analog…

A highlight of my reviewing year so far has been my experience of the PonoPlayer. When I reviewed this $399, high-resolution portable media player for the April 2015 issue, I was mightily impressed with what I heard and what I measured. But as I later wrote, in the May issue, I realized that I had not said enough in that review about the compelling nature of music played through the Pono. During a long airline flight, my attention kept being drawn to the music in a way that rarely happens with my iPod Classic…

Editor: Hello to all Stereophile readers. I'd like to personally thank John Atkinson and the Stereophile crew for your appreciation of the PonoPlayer and what it delivers.

I first realized that Pono had to happen when it became clear to me that we had lost the connection with music with the dominance of MP3, downloading, and streaming. The goal for Pono was simple: bring the music back, for all of us. Realizing it, making it happen, was a bit more tricky.

As the community around Pono has grown—it currently approaches 43,000 people—we have learned…

Editor: We have been working on the Analog Module concept for the past 2½ years. We expected a good deal of controversy over this new product line, especially in the early stages of its introduction (and we got it). In response to your review:

Analog Module Security: The methods we are employing are for our protectior against unscrupulous individuals. This is not a game of "hide and seek." Theft of another manufacturer's proprietary concepts is both illegal and immoral. We are encouraged to see that recently the courts are taking a harder line against this…

Most of today's reproducing equipment is good enough that, while there will undoubtedly…

Description: Dual-channel, solid-state (!) power amplifier. Rated power: 100Wpc into 8 ohms (20dBW) at <0.2% THD and <0.05% IMD.
Dimensions: 19" W by 10¼" D by 5¼" H. Weight: 40 lbs.
Serial numbers of review samples: 16401045 and 16401055.
Price: $895 (1977); no longer available (2015).
Manufacturer: Audio Research Corporation, Minneapolis, MN 55406 (1977). Audio Research Corporation, 3900 Annapolis Lane N., Plymouth, MN 55447-5447 (2015). Tel: (763) 577-9700. Fax: (763) 577-0323. Web: www.audioresearch.com.

Extending for four days—the first day of the show, on Thursday, May 14, is open only to the trade, which means dealers and press from all seven continents of the world are here—the Munich High End Show takes…

Sound Prints is also the name of the tribute band (a riff on Shorter's classic Footprints album), and, judging from the two times I've seen them play at the Village Vanguard, they're among the most vibrant, dizzying jazz bands around. Douglas and Lovano bounce off each other with an energy and virtuosity I've rarely seen either sustain…