Tube Power Amp Reviews

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Martin Colloms Posted: Jul 20, 2012 Published: Apr 01, 1993 0 comments
Owning a powerful tube amplifier is like owning a classic automobile. Great pleasure may be had, but ownership involves a little more care and maintenance than usual.

Jadis, an audiophile company specializing in all-tube amplifiers and operating out of a small French town, has enjoyed a good reputation for some years, even if some of its models have suffered from the reliability problems that occasionally afflict the largest tube amps. Another problem area is that of power consumption and heat output. In common with class-A amplifiers and high-bias A/B types, including solid-state models, larger tube amps give off substantial heat. The Defy-7's 240W idling consumption may or may not be welcome, according to your location and the season.

Sam Tellig Posted: Aug 13, 2012 Published: Apr 01, 1993 1 comments
Tubes, tubes, tubes.

The amps (and preamps) keep coming.

McIntosh Laboratories is back in the act with a limited-edition revival of the MC275 tube amplifier, the original of which was produced from May 1961 through July 1973—one of the longest model runs in hi-fi history.

New companies devoted to tube gear keep cropping up—in recent years, America's VAC and Cary and Canada's Sonic Frontiers. The same thing appears to be going on in the UK. The pages of British magazines are filled with new tube gear.

Dick Olsher Posted: Sep 06, 1995 Published: Sep 06, 1992 0 comments
It was back in the mid-'70s that David Berning made a name for himself in the Baltimore-Washington area as an avant-garde designer—someone with a truckload of fresh ideas about tubes. At the time, though Audio Research was starting to crank out pretty decent amplifiers, tube design was pretty much reduced to a rehash of the Williamson circuit and the Dynaco mod of the month.
Corey Greenberg Posted: Sep 01, 2004 Published: Sep 01, 1992 0 comments
I dig tube amps. When all's said and done, good tube amps seem to sound more like real life than most solid-state gear; even after listening to and enjoying the hell out of musical solid-state designs like the Audio Research D-240 II and the Muse Model One Hundred, once I hook up the big VTL Deluxe 225s again it's just like going home. I could go on about timbral accuracy and clearer midrange textures, but the bottom line is, music just plain sounds better when you shoot it through good tubes, and once most people experience that magic, they're hooked.
Corey Greenberg Posted: Aug 31, 2004 Published: Sep 01, 1992 1 comments
I dig tube amps. When all's said and done, good tube amps seem to sound more like real life than most solid-state gear; even after listening to and enjoying the hell out of musical solid-state designs like the Audio Research D-240 II and the Muse Model One Hundred, once I hook up the big VTL Deluxe 225s again it's just like going home. I could go on about timbral accuracy and clearer midrange textures, but the bottom line is, music just plain sounds better when you shoot it through good tubes, and once most people experience that magic, they're hooked.
Corey Greenberg Posted: Nov 05, 2006 Published: Apr 05, 1991 0 comments
During the time of the Native-American Comanches, a young brave had to undergo many trials by fire before he earned the respect of the tribe's adults. He was violently beaten by the men, humiliated by the women, and forced to endure physical torture such as the slow flaying of the foreskin with smoldering pine saplings drawn from the fire. Alienated from the tribe, exiled until he proved his manhood, he had to survive on wriggling cream-colored larvae and infrequent rainwater. Legend speaks of these Indian youths, dehydrated and disoriented, crawling around on their hands and knees and baying like wolves at the moon.
John Atkinson Posted: Sep 26, 1995 Published: Sep 26, 1990 0 comments
"The only tubes that I want to see in my household are...the picture tube in my TV and the magnetron in the microwave oven," a Glendale, CA, reader recently wrote, and I guess his feelings reflect those of many when confronted by a supposedly "obsolete" audio technology. Forty years after the invention of the transistor and 20 after the widespread introduction of solid-state amplifiers (footnote 1), it must come as a shock to readers of the mass-market "slicks" that not only do a number of American manufacturers manufacture amplifiers and preamplifiers using tubes, but some of those companies—Counterpoint and Audio Research in particular—are among the more successful. It is the Classic 60 power amplifier from Minnesota-based Audio Research that is the subject of this month's lead-off equipment review.
Robert Harley Posted: May 31, 2011 Published: Jan 01, 1990 0 comments
The VTL 225W DeLuxe monoblocks are very similar to the 300W monoblocks that received such an enthusiastic reception from J. Gordon Holt a year or so ago (in Vol.11 No.10) and, ultimately, most of the audiophile community. Technically, they differ only in output tubes and transformer: the 225W uses EL34s, the 300W uses 6550s. The 225Ws, at $4200/pair, cost $700 less than their more powerful brothers. The question may be raised: Why have two models so close in price and performance? According to David Manley, the 225Ws were built on special order for audiophiles who preferred the sound of EL34s to the 300Ws' 6550s. Demand was so great for the EL34 version that he decided to add it to the line. They look almost identical, the only difference being the smaller output transformer on the 225W and an additional filter capacitor on the 300W's top chassis.
Dick Olsher Posted: Feb 19, 2013 Published: Dec 01, 1989 0 comments
666rm9amp.jpgDo you believe in beginner's luck? If so, some of your personality traits should be quite predictable. Let's see. You're very likely an optimist with a "bull-market" mentality, play the lottery, and, most important, bought a CD player within a year of its introduction, or a solid-state amp in the '60s. You're apt to mail in a profusion of bingo cards (you know, the kind Stereo Review is full of) and spend hours perusing specifications in the hope of finding a kernel of truth in all of that chaff. You'd particularly be appalled at that fellow I ran into the other day, who had bought an AR-1 in 1956 and waited another decade before buying another speaker—just to make sure stereo wasn't a fad. Hey, relax, I won't turn you in; the mere fact that you're reading Stereophile is sufficient reason for redemption.
John Atkinson Posted: Aug 01, 2008 Published: Nov 01, 1988 0 comments
The last time I was in England, I happened to be rummaging through some boxes in my mother's garage, boxes containing photographs, my old school books, concert programs, diaries, postcards—all the bric-a-brac you collect throughout your life that you'll never have a need for and can never discard. If anything, such rubbish is perhaps the nearest thing to roots that anyone can have these days. Among the boxes was an amplifier that had been an everyday companion of mine for many years, the vintage Vox AC100 I had used to amplify my Fender bass when on the road.
J. Gordon Holt Posted: Oct 20, 1995 Published: Oct 20, 1988 0 comments
Not only does the venerable vacuum tube refuse to lie down and die, as everyone predicted when audio went solid-state; it continues to deliver better performance than anyone had imagined it could. Only a few years ago, we could characterize "the tube sound" as being sweet but soft at the high end, rich but loose in the midbass, deficient in deep bass, and bright and forward, usually with excellent reproduction of depth. Since then, we've seen the introduction of what might almost be called a new generation of tube amplifiers, which rival solid-state units in those areas where tubes used to have weaknesses, but have given up little of the tube's sonic strengths.
Martin Colloms Posted: Dec 26, 1995 Published: Dec 26, 1987 0 comments
JGH opens
J. Gordon Holt Posted: Aug 16, 1995 Published: Aug 16, 1986 0 comments
The D-250 is the flagship of Audio Research's power amplifier range and, at 250 watts per channel, is the most powerful all-tube stereo amplifier currently available in the US. Under the circumstances, then, it is not surprising that it should also be one of the heaviest and largest.
J. Gordon Holt Posted: Aug 30, 2009 Published: Nov 30, 1985 0 comments
Many audiophiles who have only recently subscribed to Stereophile will be surprised to find that those clunky, heat-producing, short-lived tubes that reigned up through the mid-'60s are still Executive Monarchs in the mid-'80s. Why, for Heaven's sake? Because, despite everything, people like them.
Anthony H. Cordesman Posted: Sep 23, 2011 Published: Jun 01, 1984 0 comments
66cjp4.jpgIt says something for the state of technology that, after a quarter of a century, there still is no authoritative explanation for why so many high-end audiophiles prefer tubes. Tubes not only refuse to die, they seem to be coming back. The number of US and British firms making high-end tube equipment is growing steadily, and an increasing number of comparatively low-priced units are becoming available. There is a large market in renovated or used tube equipment—I must confess to owning a converted McIntosh MR-71 tuner—and there are even some indications that tube manufacturers are improving their reliability, although getting good tubes remains a problem.

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