Kalman Rubinson

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Kalman Rubinson Posted: Jan 13, 2015 0 comments
The new Jadis JA120 monoblock amplifierss ($27,900/pair) were driving a pair of Estelon XA speakers to lusty levels at the Bluebird Music room. The design uses the newish KT120 output tubes, six per amp, and, with an additional front-end tube and a higher-gain driver stage, each JA-120 is claimed to be capable of 100W of pure class-A output.
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Kalman Rubinson Posted: Jan 13, 2015 0 comments
In addition to the Steinway Lyngdorf components which are designed to work as a system, Lyngdorf showed components which can integrate with other brands. Included were the SDA-2400 power amp (400Wpc, $2400) and the TDAI-2170 stereo digital integrated amplifier (170Wpc, $4000).
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Kalman Rubinson Posted: Jan 13, 2015 0 comments
I visited the Kevro room to get another listen to the Monitor Audio Silver 8 speakers that I reviewed in January. However, I found that Kevro was bringing Cyrus electronics back to the US. The offerings were all in the tidy and familiar half-shoebox format that permits Cyrus devices to stack so neatly.
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Kalman Rubinson Posted: Jan 11, 2015 0 comments
Magnepan demonstrated their new .7 speaker with the Conrad-Johnson MF2275 ($3850).
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Kalman Rubinson Posted: Jan 11, 2015 1 comments
One of the trends in amplification this year is the large number of stereo integrated amplifiers with digital inputs. Among these, the Parasound Halo Integrated stands out for its impressive feature set.
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Kalman Rubinson Posted: Jan 11, 2015 3 comments
At Musical Surroundings, the Metis line-stage preamp from Aesthetix, first seen at the 2014 RMAF, was running the big demo system. This new 4-tube preamp replaces the multi-chassis Callisto at about $25,000.
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Kalman Rubinson Posted: Jan 11, 2015 1 comments
For years, I have greeted Rogue's Mark O'Brien with the question, "Anything new in digital?" fully knowing that Rogue Audio is committed to vacuum tube-based analog. This time I asked "Anything new that is not digital?" and Mark beamed. Finally, I had asked the right question...
Kalman Rubinson Posted: Dec 31, 2014 5 comments
I remember reading about Monitor Audio speakers as I pored over British audio mags in the 1970s, before the economy was globalized. They were among the many worthy UK brands whose cachet was amplified by their unavailability in the US. This venerable brand has survived and flourished, while many others from the 1970s have disappeared, or become mere labels under the aegis of multinational corporations. The reasons for this success seem to be that Monitor has evolved their metal-cone driver technology, kept the focus on their core market, and continued to provide high-quality construction and finishes. So I was not surprised to read, at the back of the Silver 8's multi-language owner's manual, that the speaker was "Designed and Engineered in the United Kingdom, made in China."
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Kalman Rubinson Posted: Nov 13, 2014 0 comments
It's August as I write this, and I'm looking back at some things that need to be discussed, and forward to the fall audio shows—particularly the 2014 New York Audio Show, which, by the time you read this, will have been held in Brooklyn, September 26–28. I grew up in Brooklyn, not in "the city," Manhattan, a place that we traveled to only for special reasons. Audio shops were rare in Brooklyn—I remember only Audio Exchange—but in Manhattan there was a small cluster near Grand Central Station, there was Lafayette Radio near the Holland Tunnel, a few scattered elsewhere, and the magnet of Liberty Street in lower Manhattan, where more than two city blocks were packed with audio shops.
Kalman Rubinson Posted: Sep 04, 2014 8 comments
Power amplifiers are unglamorous but essential. In theory, they have only one task. But, according to audio sage Yogi Berra, "in theory, theory and practice are the same. In practice, they are not." Amplifiers must take a voltage input signal and provide an output of somewhat higher voltage but of substantially higher current, the product of which is power. The task is complex in that this output must be applied to electrical interfaces whose characteristics vary widely from speaker to speaker—across the audioband and, for some, even at different power levels. There are no control mechanisms or feedback signals to help. The power amp must just stand and deliver.

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