Robert Deutsch

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Robert Deutsch Posted: Jan 11, 2007 Published: Jan 12, 2007 1 comments
As Wes Phillips reported a day or so ago, The folks at PS Audio have been extremely busy of late. There have all new designs for power-line conditioners, some of them descendants of the highly-successful Power Plant active devices, others passive filter designs. An impressive couple of demonstrations by Paul McGowan showed how a competing power-line conditioner was unable to cope with a power surge that was handled with aplomb by the PS Audio product, and, similarly, a competitor’s product (with the name taped over to protect the innocent) did almost nothing to power line noise that was effectively filtered by the PS Audio product. The loving couple in the picture are PS's Terri and Paul McGowan.
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Robert Deutsch Posted: Jan 11, 2007 Published: Jan 12, 2007 0 comments
Press conferences can sometimes be tedious affairs, with the presenter going on-and-on about his company's past accomplishments, and how even greater things are coming in the future. But this description did not apply to the press conference for Usher Audio Technology at this year’s CES. This was more like an informal party for friends than the prototypical press conference. People stood around and chatted for a while, and then Atul Kanagat of MusikMatters, Usher’s North American distributor, talked briefly about how Usher’s line of high-value/high-performance loudspeakers is intended to bring more music lovers into the hobby. We then listened to some music through some very-nice-sounding Usher speakers. Pictured are PR consultant Jonathan Scull (whose name should be familiar to Stereophile readers, Usher chief engineer Joe D’Appolito (whose name should be familiar to students of speaker design), Tsai Lien-Shui (President of Usher), and Atul Kanagat.
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Robert Deutsch Posted: Jan 11, 2007 Published: Jan 12, 2007 0 comments
I’m not fond of using earplugs, so I haven’t really investigated listening to music with in-the-ear-canal type earphones. However, I've read reports from the likes of Wes Phillips and John Atkinson, extolling the virtues of these type of earphones, so when I saw the sign at the Shure booth that they had some new models in this series, I thought I'd give them a listen. The ones I tried were the top-of-the-line SE530 ($449.99), which are described as "triple TruAcoustic microspeakers," with a separate tweeter and two woofers. I listened to "Nessun Dorma" sung by Pavarotti—the source was an iPod—and was quite blown away with the effortless ease and natural quality of the sound. Maybe there is something to earphone listening after all...
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Robert Deutsch Posted: Jan 11, 2007 4 comments
When it comes to directivity in loudspeaker frequency response, the trend has been to make them less directional, both vertically and horizontally, so that the speakers would be less sensitive to seating position and allow more then one person to enjoy the same tonal balance. The new Copernicus II ($21,000/pair with powered subwoofers and digital equalization/phase correction) from Alltronics Technical Systems takes the opposite approach, going for maximum directionality/focus. The drivers form a vertical line source with a concave curve, the speakers being "aimed" at a seated listener. Not only that, but there's a motorized control moving the speaker up and down to match the exact height of the listener's ears when seated. These are what I'd call "bachelor’s speakers!" They are certainly not designed for listening by couples, but the upside is the the soundstage can be extremely precise and three-dimensional, and the sound itself was well-balanced and dynamic. Here’s designer Dennis Althar with his baby.
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Robert Deutsch Posted: Jan 11, 2007 2 comments
Divergent Technologies’ Tash Goka introduced a new top speaker in the Reference 3A line: the Grand Veena ($7500/pair), which, in addition to two woofers, a midrange and a tweeter, also has a Murata supertweeter that covers the range from 20kHz to 100kHz. The sonic contribution of the supertweeter is acknowledged to be "not easily detectable by conventional means," but is said to improve the speaker’s spatial quality and have positive effects outside of its nominal operating range. The Grand Veenas sounded mighty nice driven by Antique Sound Labs' new Cadenza amps ($6500/pair).
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Robert Deutsch Posted: Jan 11, 2007 2 comments
The Australian Ambience Reference 1800 ribbon hybrid loudspeakers ($13,995) use ribbons of their own design, combined with a vented bass section. The cabinet is sleek, with a narrowing toward the top. I quite enjoyed listening to these speakers, and, ever on the lookout for a cost-effective components, I was impressed by the fact that they were being driven by relatively inexpensive Vincent electronics (SAT-1 preamp, $1495, SAT-100 monoblock power amps, $2495/pair). Designer Tony Moore was on hand to demo the speakers.
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Robert Deutsch Posted: Jan 11, 2007 0 comments
Canadian manufacturer Simaudio is on a roll, with product introductions at just about every CES and Home Entertainment Show. This time, it was the Moon P5.3 preamplifier ($3500), with numerous "trickle-down" design features from the flagship Moon P7 and P8, and the Moon W5.3 amplifier (150Wpc, $4800). I managed to catch VP Marketing Lionel Goodfield with a less-serious-than-usual expression by telling him to imagine that they got a letter from Best Buy, saying that they want to carry the high-end Simaudio brand in all their stores and will pay full retail price just to have this privilege. :-)
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Robert Deutsch Posted: Jan 11, 2007 1 comments
In my opinion, the relation between speaker size and performance tends to be a curvilinear one: performance improves with size up to a point (assuming good design), but when speakers are really big they’re often disappointing, sounding merely "impressive" but not natural. I’m always delighted, therefore, to find an exception to this rule, and that was the case with the PBN Audio Montana Master Reference speakers at the outboarding THE Show at the San Tropez Resort. These speakers are 84" tall, weigh 500 lbs, and feature two 18” subwoofers, two 10" woofers, two 5.25" midrange units, and one 1.125" tweeter. Demoed by PBN President/Designer Peter Noerbaek and Vice-President Patty Noerbaek, these speakers, driven by PBN's own amplifiers, sounded impressive and natural. The price is $65,000/pair, but you do get a lot of speaker for the money. Peter Noerbaek says they sold four pairs last year—to people with baronial homes, I’m sure.
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Robert Deutsch Posted: Jan 09, 2007 1 comments
Sennheiser’s PXC 450 ($499.95) headphones are both the new top model in their noise-canceling series and the first using the Talk Through technology, which distinguishes between general ambient noise and the voice of a person talking to you. I tried them briefly, and was impressed both by the sound quality and by the acoustical isolation. They’re modeled here by Nicoll Public Relations’ Erika Pearson.
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Robert Deutsch Posted: Jan 09, 2007 5 comments
Convergent Audio Technologies' SL-1, in its various iterations, has been my reference preamp for some time. When the SL-1 Ultimate came out, I kidded designer Ken Stevens about the fact this designation implied that there was simply no way to improve it, so what was he going to do when—inevitably, in my view—he found ways to tweak the design? Well, sure enough, the SL-1 Ultimate is now the SL-1 Ultimate Mk.II, and Ken has a new preamp called the Legend, which is said to be even better. Improvements over the Ultimate Mk.II include a Teflon circuit board, Black Gate electrolytic capacitors, separate left and right volume controls, and a constrained-layer aluminum/steel bottom plate. An interesting feature is that the AV bypass works even without the preamp being turned on, saving tube life. The price is $15,995, which makes the $7995 for the Ultimate Mk.II seem like a positive bargain.

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