Power Amplifier Reviews

Performance
Features
Ergonomics
Value

AT A GLANCE
Plus
Convenient one-chassis design
Superb dynamics and soundstage
Channels can be bridged to double the output
Minus
Amp runs very hot
–No legacy inputs

THE VERDICT
Trinnov’s Amplitude16 packs 16 channels of serious power in a standard size component and brings music and movie soundtracks to life in a thrilling way.

Last year I had the good fortune of reviewing Trinnov's Altitude16 surround-sound processor and loved it so much it became a permanent fixture in my A/V system. At the time, I raved about its performance and, after more than a year of daily use, I can honestly say that this 16-channel pre-pro is one of the best upgrades I've ever done in my theater.

Performance
Features
Ergonomics
Value

AT A GLANCE
Plus
Exceptional performance
Exceptional build quality
Dimmable power indicator light
Minus
Pricey

THE VERDICT
It doesn’t come cheap, but NAD’s Masters M28 is a genuinely unique product designed to compete sonically with some of the highest-end amps on the market, regardless of how many channels they offer.

Whether you fall into the "all well-designed amps sound the same when used within their limits" camp or the "amp selection is critical" army of true believers, it's arguable that prior to the turn of the millennium amps designed for high-performance audio had fallen into a rut. They were so good that the advertising for them had to become increasingly creative. But a parade of skilled designers remained convinced that the new concepts they had come up with were superior, and audiophiles still lined up to buy them. The turf was always familiar: tubes remained tubes with their lovable quirkiness, and solid state was dominated by class-A/B designs as it had been since the transistor was invented.

Performance
Features
Ergonomics
Value

AT A GLANCE
Plus
Solid performance
Flexible 4-, 2-, or 3-channel setup
Five-year warranty
Minus
Intrusive rear-panel lighting

THE VERDICT
The Avalon G4 may be designed for upgrading systems to the new immersive audio formats, but it's also a fine performer that's flexible enough to satisfy other configurations.

Four may be an even number, but a four-channel amplifier like AudioControl's Avalon G4 might seem like an odd duck to some. With Dolby Atmos and other immersive audio formats becoming more common in the custom install market (where AudioControl, which manufactures products at its Seattle facility, has a heavy presence), however, upgrade-anxious customers will obviously need four additional amp channels to complement the company's existing 5- and 7-channel designs.

Performance
Features
Ergonomics
Value

AT A GLANCE
Plus
Class-A sound with improved efficiency
Exceptional transparency and control
Minus
Not the most powerful amp on the block
Display unnecessary for most users

THE VERDICT
Krell returns to form with an exceptionally capable amplifier for well-heeled home theaters where quality takes precedence over quantity.

It's hard to overstate the importance of Krell Industries in the history of high-end audio. Founded by Dan and Rondi D'Agostino in 1980, Krell was the audio equivalent of Lamborghini—an audacious riposte to more Ferrari-like rivals such as Mark Levinson and Audio Research. For almost three decades, Krell went from strength to strength, introducing a stream of ever more ambitious products that tested the depth of their customers' pockets, along with the strength of their audio equipment shelving. Then, starting around a decade ago, the brand slowly slipped off the radar screens of most audiophiles.

Audio Performance
Features
Ergonomics
Value

AT A GLANCE
Plus
High power in compact, Class D package
Dynamic, uncolored sound
Runs relatively cool
Minus
Channel configurations not ideal for typical surround layouts

THE VERDICT
All the power most will ever need, with the sound quality you want in a slim, cool-running package.

Power amplifiers are God’s gift to the long-suffering audio reviewer, his (or her) compensation for all those A/V receivers, smart-streamers, net-connected speakers, and assorted other CPU-centric components that gray and thin our hair. No arcane MAC or IP addresses for the power amp; no obfuscatory wireless setup routines, stubbornly mute computer connections for auto-EQ procedures, or HDMI ports that refuse to shake hands with other HDMI ports. Whatever its provenance, the power amp demands little more than audio inputs, speaker outputs, and a power cord and calls it good.

Performance
Features
Ergonomics
Value

AT A GLANCE
Plus
Class A/B design
Impressive sound quality
Equal power to all channels
Minus
Very heavy
Lacks balanced inputs

THE VERDICT
At $1,499, this amp is an incredible steal. While it doesn’t quite reach the heights of its more expensive competition, it still offers a helluva view.

My introduction to Monoprice happened about 10 years ago when I needed some interconnects for a system I had designed for someone on a tight budget. I’d read how great a value the company’s offerings were and decided to take the leap. Not only was my friend happy to save a few bucks from the store brands, he didn’t sacrifice any of the quality, either. From day one, the interconnects worked like a charm. Since then, Monoprice has been my go-to source for home theater cables.

Performance
Features
Ergonomics
Value

AT A GLANCE
Plus
Outstanding dynamics and headroom
Equal power to all channels
Seven-year transferable warranty
Minus
Very, very heavy
Recommended for two independent 20-Ampere power outlets

THE VERDICT
This amp never broke a sweat driving my 4-ohm speakers at insanely loud levels.

There are quite a few people in the audio world who have become household names, at least among audiophiles. I’m talking about legends like Paul Klipsch, Amar Bose, Saul Marantz, Henry Kloss, Bob Carver. But these aren’t the only influential contributors to the business and history of hi-fi. Among the lesser-known audio icons is Morris Kessler, the founder of ATI.