Thomas J. Norton

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Krell KRC preamplifier
Solid State Preamp ReviewsAudacious Audio
Thomas J. Norton  |  Nov 08, 2010  |  First Published: Jan 08, 1994  |  0 comments
Compared to the Krell KSA-300S power amplifier that I also review this month, the KRC preamp's design is, at first glance, almost conventional. But its thoroughly high-end internal design has been equally well thought-out and executed. Its main, four-layer, glass-epoxy circuit board is for the audio signal, DC power, and ground—two layers for the latter are said to minimize noise. The gain stages are pure class-A and complementary. As in the amplifier, the circuit is direct-coupled, with servo circuits controlling the DC offset. The fully regulated power supply is housed in an external chassis. Seven inputs are provided: four single-ended, two balanced, and one single-ended tape. All inputs are line-level except for the optional, single-ended phono stage. (This review will address the line stages; a Follow-Up will discuss the phono stage's operation.) There are three outputs: balanced and single-ended main outputs, and a single-ended tape output.
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Krell KSA-300S power amplifier
Solid State Power Amp ReviewsAudacious Audio
Thomas J. Norton  |  Oct 01, 2010  |  First Published: Jan 01, 1994  |  0 comments
It was a dark and stormy night. A biting, cold wind cut through Sam's skimpy jacket; ice crystals clung tenaciously to his bushy moustache. As he approached his front door, visions of a toasty-warm, Krell-heated listening room softened the chill. He could feel the glow already; his Krell amp had been on all day, awaiting his return.
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Marantz CD-94 CD player
CD Player/Transport Reviews
Thomas J. Norton, Sam Tellig  |  Nov 12, 2015  |  First Published: Oct 01, 1988  |  0 comments
Let's go back a few years. Well, more than a few, actually. The electronics end of high-end audio consisted of two companies—Marantz and McIntosh. If you were not up to shopping at their stratospheric price level—even though the industry hadn't yet invented components priced to compete with automobiles—you could always fall back on Dynaco, the poor man's high end in kit form. You hooked all this together with two-dollar connecting cables and 16-gauge zip cord purchased from the local electrical supply house, or—if you felt particularly flush—you'd spend a few (very few) bucks more at Fred's Stereo for the cables with the fancy molded plugs. Hoses were used for watering the lawns.
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Mark Levinson No.29 power amplifier
Solid State Power Amp Reviews
Thomas J. Norton  |  Nov 10, 2016  |  First Published: Apr 01, 1991  |  3 comments
I still remember reading about my first Mark Levinson product 14 or 15 years ago. It was a preamp. The model number escapes me, but it sold for over $2000. It was soon followed by the JC-2, designed by John Curl, which was a bit less pricey but still astonishingly expensive for a mid-'70s preamp. We've come a long way since then. The man, Mark Levinson, left the company that bore his name in the early 1980s and founded a new company, Cello. The company Mark Levinson became the core of Madrigal. It is a mark of their continued dedication to uncompromising high-end products that their bread-and-butter line remains the high-priced Mark Levinsons. They no longer have the Rolls-Royce of the audio market to themselves (in their early years, they made the never exactly inexpensive Audio Research products—ARC was certainly a contender for the same title—look like bargains), but they are certainly a leading player.
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Mark Levinson No.35 D/A processor
Digital Processor Reviews
Thomas J. Norton  |  Mar 29, 2012  |  First Published: Nov 01, 1993  |  0 comments
When a manufacturer sets out to design and build a product, be it in high-end audio or any other field, the final retail price is usually a prime consideration. Parts and assembly are only part of the equation; there also must be enough buyers to amortize the design and development costs. If the product is to be a flagship model—something a company hopes will give a lift to its entire line—engineers will sometimes throw caution to the winds, designing a product without thought to its ultimate price, which is only set after the design is complete. When Madrigal Audio Laboratories set out to design their No.30 Reference Digital Processor, they appear to have chosen exactly this approach.
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Mark Levinson No.36 D/A converter
Digital Processor Reviews
Thomas J. Norton  |  Aug 06, 2020  |  First Published: Nov 01, 1995  |  16 comments
To echo Audio Cheapskate Sam Tellig, who was in turn paraphrasing Thomas R. Marshall, what the world needs is a great $299 CD player. Certainly there's no shortage of expensive units vying for your attention—most of them consisting of separate transports and D/A converters.
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Mark Levinson No.37 CD transport & No.36S D/A converter
CD Player/Transport ReviewsDigital Processor Reviews
Thomas J. Norton  |  Jan 25, 1997  |  0 comments
We are now well past the era in which every review of digital playback equipment had to begin with an apology for the medium. CD replay performance may, in fact, now be bumping up against a glass ceiling. But that doesn't discourage high-end audio manufacturers from trying to advance the art, and tempt audiophiles (at least those among us who are not hopeless digiphobes) out of our minds.
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Meridian 207 Pro CD player
Solid State Preamp ReviewsCD Player/Transport Reviews
Thomas J. Norton  |  Jul 26, 2010  |  First Published: Nov 26, 1988  |  0 comments
In a way, you could say that Meridian started the now epidemic practice of modifying stock CD players (usually of the Philips-Magnavox species). The original Meridian player, the MCD, was a reworking of the first-generation Philips and was praised by J. Gordon Holt in these pages in his 1985 review (Vol.8 No.2). The Meridian Pro (Vol.8 No.6) won similar plaudits, and is still to be seen lurking in JA's system. And the original 207 was well-received by MC in Vol.10 No.3.
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Mirage M-1si loudspeaker
Floor Loudspeaker Reviews
Thomas J. Norton  |  Dec 09, 2007  |  First Published: Jun 09, 1993  |  0 comments
I only found out after beginning my auditioning of Mirage's M-1si loudspeakers that the film 2001, A Space Odyssey was, at practically the same instant, undergoing a brief theatrical revival in major cities around the US. I might have known. Perhaps it was the persistent Strauss melodies that rattled around in my head as I set them up. Perhaps it was the two 5'-tall monoliths that subsequently stared at me as I sat in my listening chair. For whatever reason, the M-1sis were an imposing sight, and the association with out-of-this-world events was not a difficult one to make.
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Mirage M-3 loudspeaker
Floor Loudspeaker Reviews
Thomas J. Norton  |  May 28, 2006  |  First Published: Nov 28, 1990  |  0 comments
It may surprise some readers to learn that all of the contributors to Stereophile do not get the chance to hear, at our leisure and in familiar circumstances, everything that passes through the magazine's portals. Not that we wouldn't like to, but there just isn't time. Nor are the logistics always right. I was therefore probably as intrigued as the average reader by LA's glowing report on the $5000/pair Mirage M-1 in the June 1989 issue. The M-1s had been on the market long enough for me to have heard them on several occasions, of course, but generally at shows and not under the best of conditions. I did get to hear them briefly at LA's later that same summer, but the hustle and bustle of a Stereophile Writers' Conference party isn't the optimum place for value judgments.
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