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by Benchmark Media Systems November 02, 2018
"In my September 2018 column, I wrote of my discovery of miniDSP's U-DIO8, which converts multichannel data fed to its USB port to eight S/PDIF or AES-EBU outputs at resolutions of up to 24-bit/192kHz. Armed with a U-DIO8, you can use three or four of your choice of stereo DAC."
"I went commando with the DAC3s directly connected to the three AHB2s. All three DAC3s were set to Home Theater Bypass, and I used JRiver Media Center's volume control."
"For the first time I can recall, I heard no noise from my system, even with an ear flush against a tweeter."
"I know that we audiophiles can obsess about small changes and make them seem more important than they actually are, but that's what this hobby is about: Eliminating as many audible flaws as possible, however tiny. In this case, the effect was striking at first listen, and endured through everything I played, even tracks that had troubled me before."
- Kal Rubinson, Stereophile
by Benchmark Media Systems October 02, 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.'"
"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
by Benchmark Media Systems September 13, 2018
'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."
by Benchmark Media Systems September 13, 2018
'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."
by Benchmark Media Systems October 12, 2017
"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
by Benchmark Media Systems October 11, 2017
"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
by Benchmark Media Systems September 15, 2017
"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.""
by Benchmark Media Systems September 15, 2017
"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."
by Benchmark Media Systems September 15, 2017
"Although similar in appearance to previous Benchmark models, with a front-panel volume control and two ¼" headphone jacks."
"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."
"It had a pleasantly forward sound, with smooth highs, a solid bottom end, and excellent image separation, said EL."
by Benchmark Media Systems January 04, 2017
The AHB2 was one of only 11 finalists in Stereophile's "Amplification Component of the Year" category. The finalists included 6 power amplifiers, 2 preamplifiers, 2 integrated amplifiers, and 1 headphone amplifier. This elite selection of amplification products included power amplifiers ranging in price from $2,995* (Benchmark AHB2) to $52,000* a pair (Vandersteen M7-HPA).
At $52,000* the Vandersteen includes a chassis milled from a solid billet of aluminum, liquid cooling and a vibration dampening suspension. It is an impressive example of mechanical engineering and industrial design.
At $2,995*, the Benchmark AHB2 delivers the quietest, cleanest power available at any price.
The AHB2 proves that top-quality audio can be affordable.
* 2016 Prices
by Benchmark Media Systems September 15, 2016
"Housed in the same small case as Benchmark's DACs, the ADC1 is a 24-bit USB A/D converter with a Texas Instruments TAS1020B USB chip and a 128x-oversampling, delta-sigma AKM 5394 A/D converter chip."
"The Benchmark produced a natural, coherent overall sound, with clean high frequencies and weighty, extended lows, said JA, who also noted superb measured performance."
by Benchmark Media Systems September 15, 2016
"Although similar in appearance to previous Benchmark models, with a front-panel volume control and two 1/4" headphone jacks, 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."
by Benchmark Media Systems July 14, 2016
"I loved the open, colorful, well-balanced, and immediate sound of this system."
"I was happy to have finally heard the Benchmark AHB2 power amp that Kal Rubinson and so many others have raved about."
- Art Dudley, Stereophile
by Benchmark Media Systems March 22, 2016
"Class A Recommended Component, 2016"
"More apparent low-level detail" - KR
"In his listening tests, Kalman Rubinson 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."
"An extraordinary amplifier" - JA
"In measuring the AHB2 and attempting to confirm its specified very high signal/noise ratio, John Atkinson 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.'"
The AHB2 shares the elite "Class A Recommended" category with amplifiers costing 10 to 20 times more.
by Benchmark Media Systems March 21, 2016
"... the only amplifier under $3,000* to be given Stereophile Class A status."
"In our review of the Benchmark AHB2, we absolutely loved what we heard. So much so, in fact, that we gave the Benchmark AHB2 our Amplifier of the Year award."
"We weren't at all surprised about the AHB2 receiving that prestigious classification. Rather, what surprised us was that it was the only amplifier under $3,000* to be given Class A status."
"When you're competing against products costing 10x, 20x or more and you're mentioned in the same breath, that's a big compliment."
- Poor Audiophile
* 2015 Prices
by Benchmark Media Systems November 12, 2015
"... it was probably the AHB2's low noise level that revealed to me much more apparent low-level detail in already-familiar recordings."
"These surprising and delicious details were evident from the bass up through the midrange and extreme treble, which nonetheless remained silky and diaphanous."
"In addition to quantity of soundstage detail, the AHB2 ... had all the power needed to drive with aplomb my Bowers & Wilkins 800 Diamond speakers to any reasonable level."
"As time passed and I listened more, I grew to love the AHB2's sound, and undertook the rewarding effort of listening through it to as many different recordings as I could. It was a great pleasure, as old friends, some already mentioned, smiled anew."
- Kalman Rubinson, Stereophile
by Benchmark Media Systems November 01, 2015
"Conventionally, it is assumed that the measurement system used to test a product is much better than the device under test."
"However, the Benchmark amplifier's specifications are close to those of my Audio Precision system ... correctly characterizing the AHB2's measured performance would therefore present a challenge. The second and third harmonics lie close to the residual distortion in the Audio Precision's signal generator."
"The Benchmark amplifier has a claimed S/N ratio "approaching 130dB," which, at 6.02dB per bit, is equivalent to more than 21-bit resolution. It is truly a high-resolution amplifier."
"Benchmark Media Systems' AHB2 is an extraordinary amplifier."
- John Atkinson, Stereophile
by Benchmark Media Systems October 21, 2014
"The big news in the familiar-looking Benchmark room was ..."
"The AHB2 high-resolution power amp has been further refined."
"The crossover of the SMS-1 The Benchmark loudspeaker has been changed."
"The DAC2 DX adds pro connectors and dual output busses to familiar and well-regarded electronics."
"The sound was especially impressive from such a small loudspeaker. Keb Mo sounded great, with a beautiful midrange and well-defined extremes."
- Jason Victor Serinus, Stereophile
by Benchmark Media Systems February 04, 2014
"Benchmark's versatile and full-featured ADC1 USB both measures superbly well and produces digital files that sound equally superb. It offers performance for which, a decade ago, you would have had to pay five times its price. It also offers better resolution than you get from inexpensive converters like E-MU's popular e404, whose nominally 24-bit A/D converter section actually has about 17-bit resolution."
"I highly recommend the ADC1 for transferring your LPs to digital."
- John Atkinson, Stereophile
by Benchmark Media Systems January 31, 2014
"Note that I've had to extend the vertical scale to –160 dBFS to reveal the noise floor. The drop in the level of the noise floor with 24-bit data indicates that the DAC2 offers 21-bit resolution, which is state-of-the-art performance."
"With the very low level of noise and superb linearity, the DAC2's reproduction of an undithered 16-bit tone at exactly –90.31 dBFS was essentially perfect."
"Even driving a very demanding 600 ohm load, the DAC2 offered very low levels of analog distortion, with the third harmonic the highest in level, at –116 dB (0.00015%). Other than the second and fifth, all the other harmonics lie at close to –130 dB. Intermodulation distortion was also superbly low, again even into 600 ohms."
"Summing up the Benchmark DAC2 HGC's measured performance is easy: It's simply superb."
- John Atkinson, Stereophile