"Benchmark describes its product as a 'reference Stereo Headphone Amplifier and Reference Line Amplifier with Relay Gain and Input Control', which should give you some idea of what's going on here, but only hints at the fact that this is actually two completely separate products packed into one relatively compact unit."
"The headphone section is powered by a power amp from THX, employing the same AAA (Achromatic Audio Amplifier) technology first used by the company in its AHB2."
"Benchmark's line amplifier uses relays for input selection, gain control and muting while four independent 256-step attenuators ... feed the the headphone ... and preamp outputs."
"As PM notes in his Lab Report, this design gives the HPA4 not only outstanding performance, but also rather impressive - to say the least - signal delivery."
"All of a track or two should do the trick, as whether with revealing headphones ... or used as a preamp, the HPA4 simply drops jaws with the sheer impact, openness and vivacity of the way it plays music."
"It was one of those real 'performer in the room' experiences and I was instantly transported back to the time I spent monitoring the recording as it was being made ..."
- Andrew Everard, Hi-Fi News, November 2018
"John Atkinson's measurements corroborated Benchmark's claim that the DAC3 is capable of "at least" 21-bit performance ..."
"Benchmark created an amplifier that more than matched the DAC3's dynamic range: the AHB2. Bridged to mono, the AHB2 has a claimed A-weighted dynamic range of 135dB ... it now sits in Class A of Stereophile's 'Recommended Components.'"
"With the DAC3 HGC and the AHB2, Benchmark seems to have achieved the lowest-noise, lowest-distortion system of source and amplification on the planet. The signals this combo sends to loudspeakers should be cleaner—truer to the source—than any other audio components can achieve."
"This article is unusual in that my goal was not to take the measure of a particular component but to determine whether Benchmark's entire low-noise system could resolve musical detail that a more typical audiophile system, with noise and distortion levels that are low but not as low, could not."
"The comparison system consisted of PS Audio DirectStream DAC and BHK Signature preamp and, variously, PS Audio BHK 300 and Pass Laboratories XA60.8 monoblocks."
"Through the Benchmark amps those quiet sounds were richer and more interesting. There seemed to be more going on in those quiet moments. It's harder to describe than it was to hear."
"Over the course of several days, I went back and forth between the Benchmark amplifiers and heard it every time. The difference didn't go away."
- Jim Austin, Stereophile
AHB2 - Class A Recommended Component - Fall 2018 - Power Amps
'Class A' is Stereophile's highest classification for recommended components. Very few components receive this elite classification. Stereophile defines 'Class A' as follows:
"Best attainable sound for a component of its kind, almost without practical considerations; "the least musical compromise." A Class A system is one for which you don't have to make a leap of faith to believe that you're hearing the real thing."
DAC3 HGC - Class A+ Recommended Component - Fall 2018 - Digital Processors
'Class A+' is Stereophile's highest classification for digital processors. Stereophile defines Class A and the digital processor Class A+ as follows:
"Best attainable sound for a component of its kind, almost without practical considerations; "the least musical compromise." A Class A system is one for which you don't have to make a leap of faith to believe that you're hearing the real thing. With Super Audio CD, DVD-Audio, and Hi-Rez PCM and DSD files now available, we have created a new Class, A+, for the best performance in those digital categories."
AHB2 - "Tightness, accuracy and punch"
"The most identifiable positive trait (there are many) of the AHB2, and that is low end control. Tightness, accuracy and punch."
"The AHB2 has power in spades, especially with two units running in mono mode."
"A single amp in stereo will suffice for most normal situations, and was in full control of all sonic responsibilities with every pair of loudspeakers we threw at it."
"The low end tightness and thrust is just where it should be, and pass though information is the name of the game."
"The sound of the amplifier is true to source and one that takes many queues from the production world of balance and monitoring."
"... will rock the house (or sooth the baby to sleep)."
DAC3 HGC - "A maestro of any musical genre."
"The DAC3 HGC has a servo-driven, knurled volume control. Raising or lowering the volume via the remote control physically moves the volume control on the DAC3. When you move the volume control by hand, you can’t help but love its smooth, precise motion."
Unboxing the DAC3 is an audio geek’s dream. You’re greeted by a spiral-bound, 8.5 x 11-inch color user manual. New users would do well to review its contents.
"Benchmark’s infrared remote control stands apart from the crowd. Its hefty, die-cast aluminum design puts it in sharp contrast to most of today’s remotes."
"The Benchmark DAC3’s DAC, headphone, and preamp functions are outstanding. I tested the preamp section with two of the company’s AHB2 power amplifiers with the amps set to bridged mono. I paired a set of of RBH Sound’s top-of-the-line Signature SV-1212NR Reference speakers with the amps; served content via an Oppo UDP-205 universal disc player, Roon Media server, and Tidal; and used Focal Clear, Oppo PM-2, and Beyerdynamic Amiron Home headphones in my listening tests."
"Jazz, hip-hop, classical, or rock, the Benchmark DAC3 proved a maestro of any musical genre, consistently demonstrating tremendous balance, refinement, neutrality, and most of all, command."
- Theo Nicolakis, Tech Hive
HPA4 - "One of the most transparent audio products I have ever heard at any price"
"Marvelously open and clean"
"The HPA4 is a co-design by Benchmark and THX, Ltd. using the THX Achromatic Audio Amplifier (AAA™) technology that was implemented in the Benchmark AHB2 amplifier a couple of years ago."
"The HPA4 is sonically neutral, distortion free and deeply dynamic."
"The rotary relay gain control features 256 steps in 0.5 dB increments."
"The key to a superior volume control is how it sounds when you turn it down ..."
"... you should be able to hear the gentle room reverb of drum cymbal or ringing piano note decay as you turn the volume down."
"The Benchmark HPA4 with its precision relay and ultra quiet amp section, sounds the same at reduced levels as it does when it is turned up."
"The Benchmark HPA4 is one of the most transparent headphone amps I have ever heard — at any price. Just as impressive is the line stage, which delivers volume control that many an esoteric analog or digital preamp could only dream of."
"To say I am impressed with Benchmark HPA4 would be an understatement."
"Based on my impressions, the Benchmark HPA4 receives two Everything Audio Network Stellar Sound Awards. One for its headphone amp and one for its line stage. Folks, it is that good."
- John Gatski, Everything Audio Network
HPA4 - "The best sounding headphone amp I've heard"
"For the first time in my audio life I can pin my ear to each speaker driver and hear absolutely no sound coming from the speakers in a quiet room with the system volume control at any position from minimum to maximum with no source material playing. Most amps produce quiescent noise under such conditions loud enough to be clearly heard at least a foot from a speaker driver, often more like several feet."
"While you may think that any amp whose quiescent residual noise you cannot hear from your usual listening position is quiet enough, that has not been my subjective experience. This is one reason I'm now a big fan of the Benchmark equipment, including the AHB2 amp. I've been using a pair of them in bridged mono, as well as the Benchmark DAC3 HGC to drive my Harbeth M40.2s for awhile now."
"I find that lowering the background noise paints the music on as black a canvas as possible and thus seems to bring out realistic low-level detail in recordings."
"The Benchmark HPA4 is the best sounding line amplifier I've yet heard. It's innovative approach to controlling system volume/SPL results in what for me is a uniquely transparent-to-source experience."
"It is also the best sounding headphone amp I've heard, both for very-insensitive, hard-to-drive phones and those sensitive enough to easily be used directly from a smart phone."
"The HPA4 truly stands apart in terms of measured and subjectively low background noise and distortion when driving either loudspeakers or headphones."
- tmallin, whatsbestforum.com
DAC3 HGC - "I was immediately impressed by the sound"
"The separation of sounds, that see-through quality, and the air around individual instruments and voices is what distinguishes the difference between simply good high-end digital components and excellent sounding high-end digital components."
"It is this sense of space that I more often than not notice first. And I noticed this trait immediately with the Benchmark Media DAC3 HGC."
"The Benchmark Media DAC3 HGC is a fantastic digital-to-analog converter that comes with a fantastic headphone amplifier with two outputs, and can also double as a fantastic preamplifier. Its asking price is more than reasonable for such a versatile component, with a sound quality that can be compared to units costing much more."
DAC3 DX - "Open, smooth detailed sound with that recording studio accuracy that I am used to from Benchmark."
"I cannot say enough about the DAC3-DX’s sonic character of transparency and accuracy."
"My DSD DSF rip (of the often played) Warren Bernhardt - So Real SACD sounded incredible through the MartinLogans using this DAC. The audible cymbal splash sheen detail is like hearing the cymbal in the front of your listening room."
"Same with the Steinway piano tone. Upper register notes are so live sounding. The “air” and “space” around and between the instruments is simply stunning when played on the best gear."
"On numerous hi-res tracks, the opinion was the same: sonic excellence!"
"The DAC3-DX most certainly gets an EAN Stellar Sound Award, and should be closely looked at by pros and audiophiles alike."
2017 EAN Product of the Year
- John Gatski, Everything Audio Network
"In this age of ultra-refinement in the production and playback of music, Benchmark Media shows that it is to be recognized as a paragon of musical integrity at an affordable price point."
"I suspect that especially younger ears, and the ears of those who spend much time with headphones, will appreciate the Benchmark sound. I appreciate them as I have experienced many less accurate systems, and I revel in high purity playback."
"The only listener who will need to consider carefully prior to commitment to Benchmark is the lover of warm, perceptually “softer” or “laid back” sound."
"Those who are seeking a highly revealing sound, perhaps considered “honest” or “truthful”, and invigorating, would find great satisfaction with these components."
- Doug Schroeder, dagogo.com
DAC3 DX - "Will bring the studio to your home audio system."
"Benchmark’s DAC3 DX DAC is designed for recording and mastering studios, but it is a great product for consumer use as well."
"The Benchmark Media DAC3 DX is the successor to the DAC2 DX. The differences between the DAC3 DX and the DAC2 DX are (1) active 2nd harmonic compensation, (2) active 3rd harmonic compensation, (3) lower THD+N, (4) lower passband ripple, (5) improved frequency response, (6) faster PLL lock times, (7) faster switching between inputs, and (8) adjustable calibration."
"For the bench tests, I have moved to using much more sensitive measurements with the Audio Precision ... the distortion is so low, it is beyond the Audio Precision’s capability."
- John E. Johnson, Secrets of Home Theater and High Fidelity
AHB2 - "Best Stereo Amplifier of 2017"
"Masterfully detailed and transparent with spot-on tonality and some serious punch." - Ben Shyman, Home Theater Review
DAC3 HGC - "Astonishing Fidelity and Emotional Expressiveness"
"Benchmark Media Systems’ DAC3 HGC is evidence that an engineering-focused company—one that seems to spend more time staring at instruments than testing its devices with their ears, and that cares more about transparency than it does about whether or not you like the sound their products make—can produce a product of astonishing fidelity and emotional expressiveness."
"Science works ... never underestimate a good geek."
- Jim Austin, Stereophile
DAC3 HGC - "All I can say is 'Wow!'"
"The Benchmark DAC3 offers extremely low levels of harmonic distortion from all its outputs. Intermodulation distortion was similarly vanishingly low."
"No power-supply–related spuriae can be seen, and the random noise floor lies below –160 dBFS!"
"When the DAC3 decoded dithered 16-bit and 24-bit data representing a 1 kHz tone at -60 dBFS, the increase in bit depth dropped the noise floor by more than 30 dB, indicating that the Benchmark’s resolution is at least 21 bits."
"This as good as a DAC can currently get!"
"All I can say is 'Wow!'" - John Atkinson
DAC3 DX - "The DAC3 hits the mark..."
"If we had to categorize the sound of the DAC3 using three words, those words would be precision, precision and precision."
"Partnered with the AHB2 power amplifier, the system represents a significant powerhouse in a relatively small footprint."
"Dynamics were surprisingly tight, quick and responsive in a manner that would make most audiophiles take another look at the “pro” side ..."
DAC3 HGC - "At the top of its class ... highly recommended."
"I’m immediately struck by the way the depth presented by the current model immerses you in the recording."
"Having put the DAC3 through its paces with a wide range of tube and solid state amplifiers for The Audiophile Apartment, as the core of a high performance, yet highly compact system, the DAC3 is a charmer, indeed."
"The three-dimensionality is the best I’ve achieved on my reference system."
"This is a special digital product indeed."
"Since the introduction of the original DAC1, Benchmark has set the industry on its ear..."
"We gave the original DAC1 our first Exceptional Value award in issue 3, and the current DAC3 HGC is an equally good value, earning this award again in 2017."
- Marck Marcantonio, Tone Audio
AHB2 - Stereophile Class-A Recommended Component
"The AHB2 makes use of THX Corporation's Achromatic Audio Amplifier (AAA) technology, in which a low-power feed-forward amplifier drives a low-bias class-AB output section, the latter energized by a system of class-H power-supply rails that deliver power in response to demand—resulting in an extremely efficient amplifier capable of robust power output."
"In his listening tests, KR discovered "much more apparent low-level detail in already-familiar recordings"—a characteristic he credited to the Benchmark's evident noiselessness—and a tonal balance that "sounded more 'right' than any of [the other amps on hand].""
"In measuring the AHB2 and attempting to confirm its specified very high signal/noise ratio, JA observed nonlinearities in his testing equipment that "haven't affected the measured performance of other amplifiers I've tested, but they were detectable with the AHB2's very low intrinsic distortion and noise." His conclusion: "an extraordinary amplifier.""
"KR's last word: "bargain.""
DAC2 HGC - Stereophile A+ Recommended Component
"Although similar in appearance to previous Benchmark models ... , the new DAC2 HGC uses four 32-bit ESS Sabre DACs, run in balanced configuration, for a significantly lower noise floor; has a new Hybrid Gain Control (HGC) for volume attenuation, which combines active analog gain control and passive low-impedance attenuators in the analog realm with a 32-bit digital DSP gain control for digital signals; and provides front-panel displays for both sample rate and word length."
"It had a pleasantly forward sound, with smooth highs, a solid bottom end, and excellent image separation, said EL."
"JI noted the DAC2's good scale and sense of ambient space."