Larry Greenhill

Larry Greenhill, Thomas J. Norton  |  Sep 02, 2010  |  First Published: Oct 02, 1984  |  0 comments
James Bongiorno, the engineer behind the Sumo Andromeda, has enjoyed a long and colorful career as an audio amplifier designer. He has cast himself at times as an enfant terrible, exploding at audio critics and running scandalous advertisements (footnote 1). His best-known amplifier is the Ampzilla, produced by Great American Sound, but he also designed the Dyna 400. Currently Jim is living on a boat and serving as part-time consultant to the Sumo Company.
Larry Greenhill  |  Aug 03, 2010  |  First Published: Oct 03, 1989  |  1 comments
Velodyne introduced their series II subwoofer line in the fall of 1988, and it seems timely to review their largest, most powerful unit, the ULD-18. As the line's flagship, this Velodyne subwoofer represents the most sophisticated and expensive system offered by the company. It is sold as a system, complete with driver, enclosure, amplifier, control unit, electronic crossover, and servo cable and circuitry. Velodyne's unique servo circuitry, manufacturing techniques, and aggressive sales technique emanate from the company's designer, David Hall.
Larry Greenhill  |  May 10, 2010  |  5 comments
JBL was founded 60 years ago, by Jim Lansing. Its history has been amply detailed in the book The JBL Story: 60 Years of Audio Innovation, by the late John Eargle's (JBL Professional, 2006). Although it is primarily known for its pro-audio loudspeakers, the Californian company has offered a steady stream of high-performance domestic loudspeakers to the home market, including the 1971 Paragon, the L100 bookshelf speaker, and the JBL 250Ti floorstander, all of which remained in JBL's catalog for 20 years. In 1990, JBL produced the Project K2 S9500 flagship speaker for the Japanese high-end market. The K2 Project culminated in the $60,000/pair DD55000 Everest system, with its cross-firing asymmetric horns, and the subject of this review, the Synthesis 1400 Array BG, was a spin-off from the K2 project. It features horn-loaded midrange and tweeters to attain a flat response out to a claimed 48kHz.
Larry Greenhill  |  Apr 20, 2010  |  0 comments
It's been over two years since I reviewed a pair of JL Audio's Fathom f113 subwoofers. Kalman Rubinson and I both gave the f113 top marks for delivering clean, powerful bass in a wide variety of full-range systems. At the end of the review period, JL Audio's Carl Kennedy told me that they wouldn't send me another subwoofer for review until they had developed one that outperformed the Fathom f113 (footnote 1). To this day, the Fathom f113 tops the subwoofer category in Stereophile's "Recommended Components."
Larry Greenhill  |  Feb 23, 2010  |  1 comments
In February 2009, I reviewed Bryston Ltd.'s first CD player, the $2695 BCD-1, and was very impressed by what I heard. The BDA-1 ($1995) is the Canadian company's first standalone DAC. It's slim, only 2.75" high, with the engraved company name, model number, and infrared sensor grouped at the extreme left of a front panel of polished aluminum. Farther to the right are two columns of four LEDs each that comprise the sample-rate indicator, which identifies the selected input's signal frequency and whether the BDA-1 has locked to it. Closer to the center is the Upsample control, which governs the conversion of the incoming digital signal synchronously to 192kHz or 176.4kHz. The Upsample LED turns green for 192kHz, red for 176.4kHz. Digital sources are selected by pressing one of eight pushbuttons just right of center: two TosLink, four S/PDIF (coaxial), one AES/EBU XLR, and one USB 1.1, the last accepting only signals with sample rates at or below 48kHz. An LED above each pushbutton lights green for an incoming PCM datastreams and red for other types, including multichannel Dolby Digital streams.
Larry Greenhill  |  Jan 14, 2010  |  0 comments
Friday was the busiest day I and other Stereophile writers found at the CES venues. Pictured here is a lull in the traffic taken from a window at the Las Vegas Convention Center (LVCC) near the press room, where the line for the free press lunch stretched hundreds of feet. Later that day, the bus and cab lines at the LVCC stretched half a mile as evening approached and the temperature outside dropped from mid 60s to temperatures in the 40s (Fahrenheit). Little evidence of a recession was visible in pure crowd count, but I ran into many more Asian and European attendees, while missing some friends in the audio high end community who skipped CES this year.
Larry Greenhill  |  Jan 13, 2010  |  12 comments
I was highly impressed with the dynamics, speed, and pace of a new $8000/pair loudspeaker from John DeVore, a speaker maker from my area of the country, Brooklyn, New York. I had first read about John in the New York Times when it featured new and brave entrepreneurs making their way in Brooklyn during the recent recession. I was interested, because of my medical research background, that the very tall Mr. DeVore had been positively influenced in his younger years by an uncle who was a leading primatologist, and had take him to Africa to view various monkeys living in their natural habitat. As a result, John names his loudspeaker lines for various species, including the Gibbon, Silverback, and now Orangutan. This floorstanding, two-way, high-sensitivity ([95]dB/2.83V/m) loudspeaker features a 1" silk-dome tweeter and a reflex-loaded, 10" treated-paper woofer (rear port) in a cabinet with a lace walnut finish. I was struck by the similarity between John's energy and enthusiasm and the dynamics and pace of the music the Orangutan generated driven by the 15Wpc Mag Amp.
Larry Greenhill  |  Jan 13, 2010  |  1 comments
John Devore was using this diminutive integrated amplifier, the German-manufactured Acoustic Plan Mag Amp, to drive his new high-sensitivity loudspeakers. According to Jonathan Halpern, the US importer, the Mag Amp uses a tubed voltage-gain stage and an output stage comprised of two small transformers with dual primaries. He described it as the "world's first switching integrated amplifier, and added that it was designed by Lars Lundahl in the 1960s. The 19 kg stereo chassis offers 15Wpc into 8 ohms and will cost $18,500. It played both a 1980s recording of Ella Fitzgerald and one of Stravinsky's Pulcinella Suite with great dynamics, speed, and detail. This is the kind of odd and fascinating gem one can uncover at the end of a day when one is too tired to rush out of an exhibit room, and instead collapses on the couch to listen.
Larry Greenhill  |  Jan 13, 2010  |  5 comments
"Go and hear the KEF Concept Blade Loudspeaker," encouraged John Atkinson, "it’s their current statement on the state of loudspeaker art." For reasons unclear, KEF selected a hard-to-find Hilton Hotel suite for their exhibit, far away from the high-end exhibits in the Venetian Hotel. But when I whispered the word "Blade," I was ushered into a dark room where the set of twin loudspeakers, looking like aircraft wings, were standing. The cabinet curvature eliminates cabinet resonances, I was told. The KEF engineer explained that the company had not set a price on the Blade because they regarded it like a concept car, a one-off, handbuilt test model.
Larry Greenhill  |  Jan 12, 2010  |  5 comments
John Atkinson introduced me to English engineer Laurence Dickie, who was sharing our ride up the elevators to the 34th floor of the Venetian Hotel. Mr. Dickie is a well-known loudspeaker designer, responsible for the original B&W 800 and B&W Nautilus loudspeaker designs, and as well as the cute little Blue Room Minipods, and is now creating new products for South African company Vivid from his design studio in Brighton, England. "Dick," as he is known to his friends, designed the G1 flagship for Vivid, which retails now for $65,000/pair and was being demonstrated in the Convergence Audio suite with, among other things, the piano recordings John Atkinson made and wrote about in the February issue’s “As We See It.” Laurence is shown here with the smaller G2, which was being demmed in the Halcro room and so impressed Erick Lichte.

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