AHB2 Review - Jerry Seigel, 10 Audio - "Perfect 10 Award"
AHB2 - "I Purchased the Review Sample"
"The Benchmark AHB2 is a very fine sounding, easy to live with, zero-maintenance power amplifier that has enough power for most systems. If more power is needed, two amplifiers configured for mono can provide it."
"The decision to purchase the review sample and make the Benchmark AHB2 a new, long term reference took over a month of listening and comparisons."
AHB2 - "Instantly Grabbed the Audio World's Attention"
"The Benchmark AHB2 solid-state stereo power amplifier immediately grabbed the audio world’s attention about 7 years ago when it was introduced."
"There are already a number of reviews, so the purpose of this one is to add another data point, another reaction to add to the knowledge base of this remarkable amplifier."
"Just looking at the amplifier’s diminutive size of about 11 inches wide, 3.9 inches high, and 9.3 inches deep, and 12.5-pound weight will not prepare one for the quality of performance delivered by the nicely finished package."
"The key to the small size and weight is the “tightly regulated resonant switching power supply”, which is claimed to be over 90% efficient. A switching power supply does not require “big iron” power transformers and large capacitors."
Not Class D
"One might well assume that due to these specs the amplifier is some kind of Class D “digital” tech. Not so! The amplifier has a low-bias bipolar class AB output stage which produces far less heat than most other amplifier bias schemes, especially those with high bias Class A output stages."
THX-AAA Technology
"Other significant technologies include patented THX-AAA feed forward error correction. This is critical to the excellent sound of the amplifier as it eliminates crossover distortion, the common bane of push-pull amplifiers."
"Immediately upon cuing up the first musical selection, it was perfectly obvious that the AHB2 has outstanding extension in the upper treble, seemingly unlimited. In this regard, the Benchmark amplifier should be compared to excellent Class A or AB amplifier technology."
"The AHB2 lacks the characteristic, almost subliminal harshness in the upper frequencies that is observed in some push-pull amplifiers, but absent in single-ended amplifiers."
"The overall sound is very true to the recording with regular 'virtual reality'-like experiences. These last for long periods of a listening session, not just as a momentary feeling of great sound. This is due to the exceptional linearity across the musical spectrum. The coherence and resolution of all sounds - which have stunning low level resolution - is special, encouraging the listener to maximally enjoy a musical performance."
"Sound Stage is 3D, Large and Stable"
"The imaging and sound stage is 3D, large and stable. It is a simple exercise to point a finger directly at a performer, even when several are present in the recording. The sonic image is remarkably focused and apparent."
"The Benchmark AHB2 is a very fine sounding, easy to live with, zero-maintenance power amplifier that has enough power for most systems. If more power is needed, two amplifiers configured for mono can provide it. The decision to purchase the review sample and make the Benchmark AHB2 a new, long term reference took over a month of listening and comparisons."
"The outstanding musicality of the Benchmark AHB2 takes some time to convince the listener of its wholly musical presentation. This subtle excellence assures long term satisfaction."
- Jerry Seigel, 10 Audio
Read the entire review at 10audio.com →
AHB2 - "Perfect 10" Award
Also in Reviews
AHB2 Review - Mike Prager, Future Audiophile
"For years, the audio world acknowledged one main contender (at least at sub-five-figure pricing) for the quietest, cleanest, most neutral power amplifier around. That was the Benchmark AHB2, whose specifications are still, for all practical purposes, unsurpassed, even by today’s excellent Class-D amps."
"10 years after its release, the Benchmark Media Systems AHB2 stereo power amp is still a standard-bearer in clean, neutral sound in the audiophile world."
"I greatly enjoyed having a pair of AHB2s in my system – their purity, neutrality, and seemingly unlimited power provided a clear window on the music and a lot of joy."
"I especially appreciated the AHB2’s smooth, well-integrated treble, free of splashiness or grain, and its natural reproduction of the human voice."
- Mike Prager, Future Audiophile
AHB2 Review - Constantine Soo, Dagogo
"The AHB2 bridgeable stereo amplifier ... was the topic of a recent discussion between American electrostatic panel speaker manufacturer Sound Lab’s president, Dr. Roger West, and me."
"In our discussion, he related his highly positive experience in driving even his largest, $55k Majestic 945 panels with the $7,000 pair of Benchmark Media AHB2 monoblocks, along with the $3,050 LA4 Preamplifier and factory XLR cables."
"Dr. West described the AHB2 as a class AB design using “feed-forward distortion reduction [thus removing] any possibility of pushing the margin of safety of a standard feedback loop, used in most amplifiers, into an unstable oscillatory mode.”"
"He further shared with me that “this is of most concern on powerful musical transients. The distortion of the amplifier in the balanced mode is astonishingly low even at just below the clipping level of 380 watts.”"
"The prospect of the AHB2’s specified distortion level of 0.00015% or lower when at full volume is comical at first glance, but upon actual audition the impact of the achievement is very audible from medium-high listening levels and upward."
"It was unlike any other sub-$20,000 amplifier I have auditioned."
"My audition of the Benchmark Media AHB2 amplifiers underscores the reason Dr. West is so taken by it, and confirms the design is best described as a watershed moment in the high-end audio industry."
- Constantine Soo, Dagogo
DAC3 Review - Jerry Del Colliano
"Benchmark is a stalwart brand in pro audio, but has carved out a very respectable niche in the audiophile world with their diminutive but powerful components."
"The audiophile world sometimes looks to the professional audio world for enlightenment, especially on the digital side of things, and Benchmark Media is one of the companies that we put high on a pedestal."
"They are hardcore digital engineers freezing their asses off in upstate New York as they come up with some pretty innovative ways to get your varied digital sources sounding as much like the master tape as possible. Thank you for your service, gentlemen."
"If you really want to hear what your music sounds like in today’s streaming-driven world, this might just be the DAC that you need to test out."
- Jerry Del Colliano, Future Audiophile