"Benchmark Media Systems used RMAF 2018 to launch two new products that it was able to lump together into one neat little stack."
"On the top is the DAC3 B, which has the same basic circuitry as the company’s more expensive DACs, but deletes the volume control, polarity and mute buttons, and headphone amp found on those models. The omission of those features is the reason for the B -- it means basic -- as well as a price that’s lower than its other DACs."
"On the bottom is the LA4 linestage preamplifier..."
"The LA4 has two pairs each of single-ended (RCA) and balanced (XLR) inputs, and boasts some impressive specs: THD of less than 0.00006% and a signal-to-noise ratio exceeding 135 dB from 20 Hz to 20 kHz."
"Volume is controlled by dual 256-step attenuators that operate in 0.5 dB increments. Another feature is a touchscreen that can be used to adjust channel balance, to rename or offset the level of inputs, and to adjust screen brightness, as well as other things."
- Doug Schneider, SoundStageGlobal.com
"Since the HPA4 arrived, I have rediscovered so many of my favorite works all over again with improved detail retrieval dynamics and transparency that it’s hard to pull myself away!"
"It drove my power hungry Abyss Phi TC headphones with complete authority, but it was still dead silent and nimble enough to amplify my easy to drive Focal Utopia headphones."
"Rarely have I come across such a wonderfully revealing amplifier that can drive many different types of headphones so darn well! The solid build construction and various controls make the $2,995 price tag seem a bit low based on the other headphone amplifiers in this market space."- Peter Pialis, Headphone.guru
"Benchmark Media Systems’ LA4 preamplifier presented an utterly realistic reproduction of what was contained on each recording I played through it -- and weak recordings stood out more than usual. The LA4’s clean, analytical abilities are unmatched by any similarly priced preamplifier I know of. The LA4’s touchscreen brings it up to date with current user interfaces, and permits functions, such as balance control and muting at the device."
"If you want a preamp that editorializes, look elsewhere."
"If, like me, you value a high-resolution, totally neutral musical performance, add a Benchmark LA4 to your system, particularly if you already own a Benchmark DAC."
- Erich Wetzel, SoundStage! Hi-Fi
"You’ll have a tough time finding a cleaner, quieter, more transparent line amplifier and headphone amplifier anywhere, at any price. I found it to be a new reference. Once I heard it, I could not live without it, so I purchased the review sample. The HPA4 deserves my highest recommendation."
"The HPA4 is the latest product from Benchmark Media Systems, an upstate New York audio manufacturer. Benchmark calls it a headphone amplifier, but it’s really two products in one, combining the LA4 Line Amplifier introduced in 2018, with a headphone amplifier. It is also based on the same THX Achromatic Audio Amplifier technology used in Benchmark’s acclaimed AHB2 power amplifier."
- Gary Galo, Audioxpress.com