Solid State Power Amp Reviews

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.'"

I should have trusted my ears. When I first encountered Infigo (pronounced In-FEE'-go) electronics, paired with Alta Audio's Adam loudspeaker, at T.H.E. Show 2022 in Long Beach, California, I wrote, "Timbres were beautiful on bass and high-pitched percussion. The chimes and vibes sounded special and clean, colors were plentiful, and deep bass was all of one piece." Nor was I exaggerating. In that system, Infigo's Method 3 monoblocks ($55,000/pair) pleased my ears as much as their blue-illumined interiors delighted my eyes.

Rather quickly, Editor Jim Austin suggested I review the Method 3. Perhaps he'd already been tipped off by Ken Micallef's praise when he first encountered Infigo in November 2021 at the Capital Audio Fest, and by the ensuing buzz.

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.

It began with a bad outlet. Perhaps two weeks after my husband and visiting friend created several delightful holiday light displays in the living room, one of the living room outlets died. Every time I tried to plug in part of the light show, it, along with the living room sound system and reading lights, lost power. If the Grinch didn't exactly steal Christmas, he sure tried to guarantee it would arrive silently under the cover of darkness.

I moved fast. Distributor Wynn Wong would arrive from Toronto in less than a month, to install two Serbian-made Karan Acoustics POWERa monoblocks ($106,000/pair) for review. These monoblocks weigh an astounding 231lb each, with a shipping weight of 286lb; each contains two 2700VA toroidal transformers and a 210,000µF bank of custom capacitors. Each monoblock requires two 15A power cables, one for each amplifier stage.

At AXPONA 2022, I eagerly headed to the Esoteric exhibit, where I spoke with Keith Haas, national sales manager of 11 Trading Company, Esoteric's US distributor. When I learned of the forthcoming Grandioso M1X monoblock ($35,500 each), the culmination of a complete revision of the company's top-selling M1 monoblock (now discontinued), I worked with Haas and Editor Jim Austin and set up a review.

Back in 1999, while reviewing the Wazoo integrated amplifier from Bow Technologies, I learned that its designer and company founder, Bo Christensen, had previously founded another audio company. That's how I discovered Primare. Over the years, various products from Primare have appeared at audio shows but never grabbed my attention. In a recent EISA press presentation, however, Primare showcased an eight-channel amplifier that did, given my interest in multichannel audio. I was glad to be able to attend.

We've all been in similar situations. We approach an undertaking with the highest of expectations. Then reality intervenes, expectations change radically, and we have another story to tell, post on social media, or use to begin a review.

This tale of altered expectations began a few years after my birth, at AXPONA 2022, where I covered several stellar-sounding rooms that included Simaudio Moon electronics. By the third such room, I'd resolved to contact Simaudio, check in with Jim Austin, and see if there was a product that made sense to review in my system.