AXPONA Show Report - Stereophile Magazine
DAC3 B and AHB2 - Driving Laufer Teknik Note Line Array
Two AHB2 bridged-mono amplifiers were driving the 4-Ohm line arrays (48 drivers per side).
"Sound was extremely well-integrated and controlled, and the bass memorable."
The Note Line Array
"Laufer Teknik claims that the speaker has 360° dispersion up to 10kHz and 180° dispersion above that—when I walked around the speaker, sound was loudest in the front-firing direction—50 to 100 times less distortion and up to 200 times the dynamic range "of a typical D'Appolito design," and the ability to work in a "really large room." The Note has no crossover above the subwoofer, stands 87" tall, is a mere 2" wide and 2.5" deep, and weighs only 40lb."
Two DAC3 B Converters - One for the Array, and One for the Subs
"The Note received signal through Benchmark Media's AHB2 power amps, DAC3 B D/A processor, and interconnects."
Two AHB2 Power Amplifiers - Bridged Mono Mode - One per Array
"The system sounded super on a 16/44.1 file of the famed rendition of Copland's Fanfare for the Common Man, recorded by Eiji Oue and the Minnesota Orchestra for Reference Recordings."
- Jason Victor Serinus, Stereophile Magazine
Also in Reviews
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
HPA4 Review - Chris, DC Hi-Fi Group
"The Sound of Silence"
"Benchmark Audio is an engineering focused company with a deep heritage in the recording studio world."
"The HPA4 is a Headphone Amplifier and Preamp that incorporates the THX-888(AAA) achromatic audio amplifier circuit that was first introduced to the world in the Benchmark AHB2 amplifier."
"To this day the AHB2 remains the lowest distortion and highest SNR amplifier on the market."
"The Direct Opposite of Typical Tube-Based Technology"
"From a listening stance it is the cleanest and most accurate delivery of sound you are likely to get with any Hi-Fi component."
"This is the direct opposite of the typical sound of tube-based technology that is awash in second harmonic distortion and noise."
Power
"The HPA4 …offers 6 watts into 16 ohm and a whopping 11.5 Vrms into 300 Ohm headphones."
"You will not be running out of power with this device."
Listening
I used the track "Slink" from the brand-new Artemis album on Blue Note."
"It is a very dynamic driving track and the Artemis ensemble makes the most of it. The HPA4 and revealed all the sonic details of this track."
"I give the HPA4 my highest recommendation."
- Chris, Forum Administrator - DC Hi-Fi Group