Larry Greenhill

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Larry Greenhill Posted: Jan 13, 2013 4 comments
Boulder Amplifiers, Inc., introduced its new Model 3060 Stereo balanced, class-A amplifier ($114,000), a huge, 900Wpc, solid-state amplifier that weighs 450 lbs! Sitting nearby was the company's flagship monoblock, the silver 3060 ($205,000/pair), a class-A 1500W power amplifier shown in my photograph. A large cylindrical tube, containing 4 large mineral-potted toroidal power transformers, runs down the inside middle of the chassis. This is said to dampen any transformer-induced vibration. The mono amplifier uses 120 high-temperature rated bipolar transistors and 48, 160V, high-temperature rated, 4700µuF electrolytic capacitors for energy storage. Large circuit boards slide into frames at the top of the chassis, each board containing hundreds of discrete parts. With a pair of these amplifiers weighing 440 lbs, Boulder does not want this amplifier to require service, and its build quality signifies that.
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Larry Greenhill Posted: Jan 13, 2013 1 comments
Axiss Audio’s attractive setup at the Venetian highlighted AirTight's huge ATM-3011 monoblock amplifiers ($50,000/pair). The amps were part of a system that included the Focal Scala loudspeakers ($30,000), Transrotor Rondino turntable ($14,000), SME V tonearm ($5,000), AirTight PC-1 moving-coil cartridge ($11,000), AirTight ATC-2 line preamplifier ($11,000), AirTight ATE-2 phono stage ($15,000), and ATH02 step-up transformer ($5,000). The sound was involving and dynamic.
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Larry Greenhill Posted: Jan 13, 2013 1 comments
MBL’s Corona Line C-15 class-D monoblock amplifiers ($12,500 each) are rated at 500W into 4 ohms with low distortion, and none of the rising distortion with frequency found in other class-D designs. In addition, the distortion is load independent. This is a result of the circuit design MBL calls a "Linear Analog Switching Amplifier Design” (LASA). MBL designer Jurgen Reis was proud that the amplifier had been designed to meet the stringent South Korean "KT" consumer standard regulations, and "was on the way" to meeting the even more stringent "CCC" Chinese consumer requirements. Although the switching occurs at 300kHz, the amplifier is free of RF emissions up through several MHz because of extensive mu-metal shielding. The amplifier and preamplifier are available in several different cosmetics including a white or black chassis with center section in gold or chassis color. Matching C-11 preamplifier and C31 CD player, with price points are also available.
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Larry Greenhill Posted: Feb 13, 2012 3 comments
Although many high-end audio products are described as revolutionary and as breakthroughs in design when new, most audiophile components now on the market have not changed our way of relating to such products in the way the iPad has done. Once in a while, a new audio product does move in that direction by enabling the audiophile to do install a product and optimize its performance in a different way.
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Larry Greenhill Posted: Jan 19, 2012 Published: Jan 20, 2012 0 comments
Thiel and Bryston always share an exhibit area in the Sands Convention Center’s Bassano Ballroom, and this year's CES was no exception. James Tanner, Bryston's upbeat product manager, had gathered a terrific playlist of musical selections on a thumb-drive, which drove the company's $2195 BDP-1 digital file transport, $2195 BDA-1 DAC. Livingston Taylor's whistling on "Isn't She Lovely" opened the playlist, just as it did at the Joseph Audio suite, and many others—it was a common selection at the Venetian exhibits. Sound from the $9500 Bryston SP-3 preamp/processor ($7900), three-channel Bryston 6BSST2 amplifier, Thiel CS1.7 speaker prototype and Thiel USS SmartSub Subwoofer produced soundstage depth and imaging that was among the best, almost as good I heard at the much more expensive system in the VTL suite. Tanner walked me through Bryston's newly announced BHA-1 headphone amplifier featured in the photo ($1295), which is highly versatile, including twin XLR outputs for balanced headphones, and both XLR and ¼ jacks for conventional headphones.
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Larry Greenhill Posted: Jan 16, 2012 0 comments
It was good to visit McIntosh Laboratory's 35th floor suite at the Venetian Hotel and spend a few minutes with Ron Cornelius, the product manager, discussing our shared experiences with the legendary McIntosh MR-78 FM tuner. Ron showed me the latest iteration of the company's MC-275 tube amplifier. Now released as version 6, 50th-Anniversary 275, priced at $6500, it reminded me that the amplifier was first shipped in 1961.
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Larry Greenhill Posted: Jan 16, 2012 0 comments
Sumiko teamed up a pair of Sonus Faber Amati Futura floorstanding speakers — watch for JA's review in the March 2012 issue—with the $4500 REL Gibraltar G1 subwoofer to produce explosive, massive, but tightly controlled bass while playing the "Chinese Drum Poem" selection from disc 3 of the Burmester Demonstration Disc series. The REL G1 is a 108 lb, closed-box, front-firing 12" driver driven by a 600W, high-current amplifier. Sumiko's John Hunter set the gain of the G1 using a small remote. The G1 subwoofer fell totally silent when the music was free of deep bass content, as it should.
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Larry Greenhill Posted: Jan 16, 2012 1 comments
Not to be outdone by the audiophile crowd, an auto sound manufacturer displayed a huge metallic woofer that dangled from a crane. (The crane could be set to lift loads between 500 lbs and 3 tons.) I thought I had seen everything, but the North Hall of the Las Vegas Convention Center never disappoints!
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Larry Greenhill Posted: Jan 16, 2012 0 comments
Ron Sutherland had a rack of his components at CES to drive Vandersteen Quatro floorstanding loudspeakers. The rack consisted of the two monophonic Phono Block phono preamplifiers, recently reviewed by Brian Damkroger in Stereophile; the $15,000 Destination Line Stage (one non-audio signal carrying control unit with Nixie tubes, and one audio chassis for each channel); and the $10,000/pair, 200W monoblock power amplifiers. Except for the amplifier and control chassis, most of these units are configured into two side-by-side subunits—one for power supply and one for audio signal—attached only by front and rear panels.
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Larry Greenhill Posted: Jan 16, 2012 1 comments
The $25,000, 500W Mark Levinson No.53 digital-switching reference monoblock amplifier made its regular non-playing appearance at CES 2012 but this time with an illuminated cutaway display, allowing its lead design engineer, Mark Seiber, to walk me through its circuitry. The transparent panel, which the display used in place of heatsinks allowed me to easily see the No.53's four major subsections (analog input stage, modulation, amplifier output stage with its eight air-core inductors, and power supply section, which is at the bottom of the chassis.

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