Robert Deutsch

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Robert Deutsch  |  Dec 02, 2001  |  0 comments
PS Audio's Power Plant AC-regeneration devices have taken the audio and home-theater worlds by storm. The P300 was voted 2000 Accessory of the Year in Stereophile (December 2000), and the P600 won the Editors' Choice Platinum Award in Stereophile Guide to Home Theater (January 2001). The Power Plant differs from conventional power-line conditioners (PLCs) in that it doesn't just "clean up" AC but actually synthesizes (or regenerates) it. Each Power Plant is essentially a special-purpose amplifier, producing AC to run the equipment plugged into it, the maximum output wattage indicated by the model number. (The most powerful Power Plant available is the P1200, which produces 1200W.)
Robert Deutsch  |  Jan 13, 2011  |  0 comments
Several weeks before CES, I got an email from PS Audio, inviting me to a press conference that will be held during CES but not as part of the official CES itself. They promised to provide transportation from the Venetian to the Wynn, where PS Audio had a suite. I knew that PS Audio was very much into computer-based audio, an area that for the most part I’ve stayed away from, so I wasn’t all that interested in that part of their presentation; however, I’ve reviewed, and use in my system, PS Audio’s Power Plant Premier AC power regenerator, so I was intrigued by word that they would have information on the successor to the Power Plant Premier.

It turns out that they have two successors, both representing substantial reworking of the product while staying with the principle of “regenerating” rather than merely “conditioning” power. Alas, the “power plant” terminology—which I’ve always thought was quite apt—is gone: the two products are called PerfectWave P5 ($2999) and P10 ($4499). They differ mostly in terms of the amount of maximum current they can produce, the P5 putting out 1000VA and the P10 1200VA. The bigger unit also has more zones. Output impedance is lower than ever, and so is distortion.

Robert Deutsch  |  Nov 08, 2013  |  5 comments
What can you tell about the intrinsic sound quality of a loudspeaker if you've heard it only at an audio show? Arguably, not much. If it sounds bad, there may be a number of reasons for that, only one being the speaker itself. It may be the acoustics of the room, problems with speaker setup, poorly matched associated equipment, insufficient break-in/warm-up, or poor choice of demo recordings.
Robert Deutsch  |  Jan 18, 2012  |  0 comments
PSB's Synchrony One ($5000/pair) is listed in Class A (Restricted Extreme LF) of Recommended Components, and their Imagine T ($2199/pair) is in Class B. At the 2012 CES, PSB introduced the Imagine T2 ($3500/pair), which, according to Paul Barton (seen in my photo), applies the technology of the Synchrony series to the Imagine T. Like the Synchrony One, the Imagine T2 has three woofers, each in a separate compartment, which are driven together at the low end, and as we go higher in the frequency range the second and third woofer are rolled off gradually at the bottom. As with Paul Barton's other designs, the tweeter is mounted below the midrange. Driven by an NAD C390 all-digital integrated amplifier, the sound had superb clarity and detail, with excellent imaging.
Robert Deutsch  |  Jan 14, 2015  |  0 comments
Speaker designer Paul Barton is not known for coming up with new models willy-nilly, so a new model that represents a potential advance in sound quality—rather than just meeting a particular price point—is a significant event. The new speaker is the T3 ($7500/pair), and represents collaboration with a different overseas manufacturing facility than earlier models like the T2.
Robert Deutsch  |  Jan 17, 2013  |  1 comments
Active speakers—ie, those that that have built-in amplifiers—are generally unpopular with audiophiles. One well-known speaker designer working on his state-of-the-art speaker contender told me at CES that he would like it to be active but marketing told him that it wouldn’t sell, so he’s staying with the passive design. I guess Precision Transducer Engineering (PTE) didn’t get the memo—or maybe they wrote their own . . .
Robert Deutsch  |  Jan 08, 2013  |  First Published: Jan 09, 2013  |  0 comments
QAT Audio Technology is a Chinese company, whose principals have a wide range of interests, from bio-medical engineering to musical performance and composition, and their products aim at the highest level of performance. The QAT MS5 ($5990), which received the Best of Innovations 2013 award is a music server that includes a TEAC CD drive, 2 TB-capacity hard drives, and a tablet-style remote control.
Robert Deutsch  |  Jul 11, 2017  |  12 comments
If Stereophile gave an award for Loudspeaker We've Most Frequently Reviewed, the hands-down winner would have to be the Quad ESL. The list of past and present Stereophile contributors who've written about the ESL's various incarnations includes John Atkinson, Martin Colloms, Anthony H. Cordesman, Art Dudley, Larry Greenhill, J. Gordon Holt, Ken Kessler, Dick Olsher, Herb Reichert, William Sommerwerck, Steven Stone, and Sam Tellig. The ESL-63 was John Atkinson's personal "Editor's Choice" in 1992, and the ESL-989, a successor to the ESL-63, was Stereophile's 2003 Loudspeaker of the Year and Product of the Year.
Robert Deutsch  |  Jan 10, 2008  |  3 comments
Anglo-Chinese brand Quad is not one of your consumer electronics companies that revamps their entire line every year (whether it needs to or not). Some might even consider their approach a bit stodgy, resisting change. So when they come out with not just one new product but a completely new series, that has to be considered news.
Robert Deutsch  |  May 19, 2002  |  0 comments
Single-ended triode (SET) amplifiers are typically paired with horn loudspeakers, for good reason: most SETs produce very low power, so to get acceptable loudness you need a highly sensitive speaker, which means horns. Similarly, horn owners are often advised that the best amplifier for their speakers is a SET. Certainly, the horn-SET combination can be magical, but, in my experience, SETs are not the only type of amplifier that can sound good with horns.