LA4 Review - Gary L Beard, Positive Feedback
LA4 - "Audio Neutrality"
"My initial impression was simple: The LA4 preamp plays everything that is, and nothing that isn't...Neutrality in Audio... and that's really all this review needs to convey."
"The LA4 preamp may occupy neutral audio country, but it is a sweet piece of audio kit. I love its form-factor. I love its simple operation. And I love that it allows the sound of the signal to flow through to the downstream components. This means, of course, you'd better like the sound of your DAC or analog rig, because that is basically what you are hearing on the other side of the border crossing."
"The LA4's specifications are unquestionably excellent. When using pro-level balanced interconnects, the LA4 manages a Signal to Noise Ratio (SNR) greater than 135 dB, and Total Harmonic Distortion (THD) of -125 dB."
"The LA4 has a noise floor that is not just low, it's bats-strain-to-hear-it low."
Controls and Features
"The LA4's main frontal attraction is ... the capacitive touch screen."
"The screen uses graphics that are easily recognized from the listening chair."
"Less often used options that are not duplicated on the remote must be accessed from the touch screen."
"Audio options like channel balance and input gain boost / cut are controlled directly from the screen, as are other setup options, like input naming, and screen dimming."
"All features are easy to understand and simple to adjust, but just in case, there is a help button too!"
"I liked the option to adjust individual input gain by boosting or cutting the dB output up to 10 dB. It allowed me to match input levels between my digital, and analog sources."
Listening Notes
"I've found that stepped volume controls often fail to offer enough steps to ensure sufficient control, especially at lower volumes. The LA4's fully-balanced relay gain control takes care of that by providing two hundred and fifty six (!) steps in 0.5 dB increments. That makes dialing in the perfect volume level a breeze."
"One of things I look for when reviewing any component, is how well it reproduces music at lower volumes."
"The LA4 scales downward beautifully, maintaining a nice sonic balance."
"No matter the volume, the LA4 delivers a cavernously wide stage, startling dynamics, soaring treble, excellent timbre, and satisfyingly deep bass. It peels away the haze from each layer of music, unwinding musical information at a high level of detail and resolution, yet manages the magical-musical trick of never sounding sterile."
"In 2016, I reviewed Benchmark's AHB2 amplifier and DAC2 HGC digital to analog converter. Both are excellent, well priced, high fidelity components. The AHB2 was so good, I awarded it a Positive Feedback Writer's Choice award, so it seemed unconscionable to review the LA4 without its sidekick power-broker."
"The combination of the LA4 preamp and AHB2 amp serves up music with a transparently sunny disposition."
"The pair goes deep, with an effortless slam that belies their small size. The AHB2 is a very fast amp. The LA4 had no trouble providing a signal fast enough to show off the AHB2's speedy nature."
"The sound stage is excellent: depth, width, height, and the illusion of a performance space were fantastic. I really, really, really enjoyed the Benchmark duo's high level of detail, layering of instruments and voices, deep bass, and fast, furious dynamic swings."
"I really enjoy Larry Carlton and Steve Lukather's No Substitutions: Live in Osaka CD. This recording creates a nice feeling of being in a smoky, Japanese nightclub; cocktail glasses clinking amid the chatter and applause The LA4/AHB2 does an excellent job recreating the sense of being in the crowd, listening to these guitar masters. It also highlights differences between the duo's different guitar rigs, and playing styles."
"The Benchmark LA4 is an excellent preamp, an operationally solid spec-monster that also happens to sound great."
"A solid, high-quality audio component."
"Every change I made to my system—whether equipment or musical selections—could be heard."
- Gary L Beard, Positive Feedback
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