Solid State Power Amp Reviews

When Jim Austin offered the Plinius Reference A-150 stereo amplifier ($14,995) for review, it felt like a welcome blast from the past. Plinius has, lately, maintained a low profile in the US, likely due to several changes in US distributorship...Under the auspices of Ralph Abramo and California-based Plinius Audio Sales and Repair, Plinius's US profile seems to be rising again.

When I was offered the opportunity to review a Burmester product—the 216 stereo power amplifier—I accepted immediately, mainly out of curiosity. Berlin-based Burmester is an important hi-fi brand, but I knew very little about the company and their products. What better way to learn more than to review one of their products?

One of the finest chamber music performances I have ever attended took place this past August under far from ideal circumstances. The venue was one-month-old Field Hall in Port Angeles, Washington, a city of fewer than 20,000 people known more for its port and proximity to the Olympic National Forest than for its rich culture. Perhaps that reputation will soon change, because the performers in the concluding concert of the Music on the Strait chamber music festival included its two local founders, violinist James Garlick of the Minnesota Orchestra and violist Richard O'Neill, the newest member of the Takács String Quartet. These excellent musicians, who have been friends since high school, were joined by the superb pianist Jeremy Denk and cellist Ani Aznavoorian. These are world-class musicians who attract eager audiences to New York's 92nd Street Y and Carnegie Hall, London's Wigmore Hall, and other prestigious venues. . .

What was true for that live performance in Field Hall is also true for performances reproduced on audio systems: A system can be less than technically perfect yet still transmit with eloquence every iota of care and feeling that artists and engineers put into recordings. Perfection is not an essential component of musical truth. Inspiration is.

Lest readers think this preamble is intended to suggest some shortcoming in the component under review, the Accuphase A-300 monophonic power amplifier ($51,900/pair), let me reassure you at the outset: Time and again, the A-300, like Jeremy Denk's artistry, inspired a state of wonder. The more I listened to the A-300 monoblocks, the more I wanted to listen. In my too-busy life, every occasion for listening was an occasion indeed, a special event.

The finest soup I ever tasted was served in Kamakura City, Japan, in 1992. After climbing a mountain to a shrine that held a lock of Buddha's hair, I descended to Kamakura and walked to its Great Bronze Buddha. By the time I had taken my fill of the image's 730-year-old wonders and the countless picture-taking tourists at its base—a mild precursor to "the world is a backdrop for my ego" snappers of the smartphone age—I noticed that my stomach was growling.

Exhausted, I walked back into town and descended stairs into a conveniently located corner restaurant. I had to eat fast because my train back was departing soon. Looking for something quick, I ordered miso soup and eel over rice. Imagine my surprise when I found myself gazing into the most wondrous bowl of soup I'd ever seen. Floating on top of its clear, brown broth were various vegetables and herbs, each perfectly positioned in relationship to the other, as in a handcrafted textile. I felt as though I'd been granted private access to a great work of art.

What does this have to do with the Electrocompaniet AW 800 M Reference power amplifier ($22,500/each) that is the subject of this review? You'll have to read on to find out.

Can an audio brand maintain a "house sound" if the original creator of that sound is no longer among the living? If the brand in question is Ayre Acoustics, the answer is a resounding Yes.

When Ayre founder Charley Hansen passed in late 2017, Ariel Brown, who is now Ayre's vice president and chief technology officer, was ready, waiting in the wings. Brown has worked for Ayre since he was a sophomore in college. As John Atkinson wrote in his February 2019 review of Ayre's EX-8 Integrated Hub, "Brown says that for better or worse, he was indoctrinated in Hansen's way of thinking and design. 'I only know the Charley way! Charley never wanted to introduce a product unless we had something new to offer with that product. 'New–Better–Different' was his philosophy; every product had to be a step up from before.'"

It takes a while for audio-related technologies to mature. Tubed amplifiers were invented by Lee de Forest in the nineteen-teens, but while there are still some adherents of early high-distortion triode designs, the age of mainstream high-fidelity amplification dawned with higher-power/lower-distortion amplifiers developed by Williamson and McIntosh followed by the Ultralinear take on the Williamson concept. That was 30+ years down the technology-evolution timeline after de Forest.

And when it comes to solid state amplifiers—the usual kind—does anyone prefer the state of the (germanium) art circa early 1960s to modern silicon class-AB designs? I doubt it.

Now, decades into its own development, class-D amplification seems to have sea legs, even in the audiophile world.

The Momentum M400 MxV Mono amplifier ($79,500/pair) is the latest iteration of Dan D'Agostino Master Audio Systems' debut amplifier of 2011, the Momentum Mono amplifier. Weighing 95lb, it is smaller and lighter than its entry-level sibling, the more powerful, 125lb Progression M550 Mono amplifier ($47,500/pair), and is veritably dwarfed by some other monoblocks, including the flagship D'Agostino Relentless Epic 1600 (570lb) and the Karan Acoustics POWERa mono (231lb), which I reviewed in May 2023. But if the M400 MxV's rock-solid look and feel and its exquisite aesthetics—a sleek amalgam of silver and copper fronted by a power meter that glows green and radiates Rolex quality—are any indication, a helluva lot is going on beneath its showy exterior.