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Benchmark Media HPA4 Headphone / Line Amplifier

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Benchmark Media HPA4 Headphone / Line Amplifier

$3,985.00 Price Tier: High-end

5 Critic Reviews

All time low price

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Page last updated Jul 01, 2026

Pricing and availability

We compare 600+ stores and found this item at 1 store. Prices updated June 19, 2026.

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5.0 (1)

$3,990.00 $3,985.00 $5.00 · All time low

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Average Price: $3,999

High-end/Boutique

$599

$2000+

Price Tier

In the Preamps category, Benchmark Media HPA4 Headphone / Line Amplifier is priced in the High-end/Boutique range. This premium gear is built to very high standards and offers premium features.

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High-end

Price History

Based on price data from 1 merchant for "Benchmark Media HPA4 Headphone / Line Amplifier". Prices shown reflect NEW condition. Tracking began Apr 7, 2026.

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Description

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Introducing the Benchmark Media HPA4 Headphone / Line Amplifier—your gateway to crystal-clear audio fidelity. Designed for discerning audiophiles and studio professionals, this amplifier integrates THX Achromatic Audio Amplifier (AAA) technology for a listening experience that is both realistic and fatigue-free. Its precise 256-step fully balanced relay gain control provides meticulous adjustments in 0.5 dB increments, ensuring that every nuance of your sound is perfectly captured.

The HPA4 is 100% analogue and offers both balanced and unbalanced inputs and outputs, catering to high-demand audio environments. A sleek touch screen interface simplifies access to key functions like balance control and input level offset, making your workflow seamless and intuitive. With headphone outputs including 1 x TRS (6.3 mm jack) and 1 x XLR (4-pin), this amplifier is built to accommodate a variety of professional gear.

Engineered with precision, the HPA4 boasts a total harmonic distortion (THD) of less than 125 dB (0.00006%), a signal-to-noise ratio greater than 135 dB (A-weighted), and a frequency response extending from -3 dB @ 0.1 Hz to 500 kHz. Whether you are fine-tuning a track in the studio or simply enjoying your favorite album, the Benchmark Media HPA4 ensures your sound is always at its best.

Key Features:

THX Achromatic Audio Amplifier (AAA) technology
256-step fully balanced relay gain control
100% analogue signal path
Touch screen interface for easy access to functions
Headphone outputs: 1 x TRS (6.3 mm jack), 1 x XLR (4-pin)
THD < -125 dB (0.00006%)
Signal-to-noise ratio: > 135 dB (A-weighted)
Frequency response: -3 dB @ 0.1 Hz and 500 kHz
Balanced and unbalanced inputs and outputs

Owner's manual

Benchmark Media HPA4 Headphone / Line Amplifier User Manual

Videos

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Ken Jacobsen

Benchmark HPA4 Headphone | My thoughts on Pre Amp - Ken Jacobsen New Music

Ken Jacobsen

Benchmark HPA4 pre-amp and HP amp

The Hans Beekhuyzen Channel

Benchmark HPA4 Review - Is this the best headphone amp on the planet?

Passion for Sound

Reviews

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Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Benchmark Media HPA4 Headphone / Line Amplifier.

Features and functionality

0 0

The Benchmark Media HPA4 allows separate control of headphone and line-out volumes, making it suitable for diverse audio setups.
Source

Comparisons

0 0

Compared to RME ADI-2/4 Pro SE, the HPA4 offers straightforward volume control without the extensive features of RME's multi-output capabilities.
Source

Use cases and applications

0 0

Ideal for users needing distinct volume controls for headphones and monitors, ensuring precise audio management in studio or home setups.
Source

Critic Reviews

Benchmark HPA4 Review – The One to rule them All! - Soundnews

soundnews.net

Benchmark HPA4 dazzles with its pristine sound quality and unparalleled transparency. It's a marvel of engineering, featuring THX AAA-888 technology that delivers zero distortion and a broad frequency response. The amp's impeccable build and feature-packed design, including a touch-screen interface and multiple input options, make it a top-tier choice for audiophiles. However, its steep price tag of $3,000 might be a barrier for some. Yet, for those who can afford it, the HPA4 is an endgame amplifier that elevates the listening experience to new heights, making it truly "The One to rule them all."

positive

Full Review

Benchmark HPA4 headphone amplifier/line preamplifier | Stereophile.com

stereophile.com

The Benchmark HPA4 dazzles with its precision and clarity, offering an "enormous" soundstage where every audio element is distinct and well-defined. Its THX-888 amplifier technology ensures it drives even demanding headphones like the HiFiMan Susvara with ease. While it may reduce some reverberant qualities that tube enthusiasts love, it compensates with unmatched aural specificity and image concreteness, akin to a studio setting. Its compact design and intuitive touchscreen add practicality without compromising on performance. However, purists might miss the richer reverb tails and ambient nuances found in other high-end gear. Overall, for those chasing detail and accuracy, the HPA4 is a stellar choice.

positive

Full Review

Benchmark HPA4 Headphone/Line Amp Review - TapeOp | Tape Op Magazine

tapeop.com

Benchmark Media's HPA4 Headphone/Line Amplifier is a precision beast, offering unparalleled neutrality and power, especially when paired with Benchmark’s DAC and power amp. The THX-888 headphone amp is exceptionally clean and dynamic, driving even low-efficiency headphones with ease. Its relay-controlled analog attenuator ensures exact channel matching, making it ideal for mastering and detailed mixing. However, the lack of flexible output switching and level-trim memory is a missed opportunity at this price point. Despite these quirks, for those serious about their monitoring setup, the HPA4 delivers an almost “straight wire with gain” experience, making it well worth the investment for critical listening environments.

positive

Full Review

Benchmark HPA4

soundonsound.com

Benchmark Media's HPA4 Headphone/Line Amplifier is a triumph of engineering, offering pristine audio clarity and an intuitive touchscreen interface. With its robust build and versatile connectivity, it caters to both pro-audio and hi-fi enthusiasts. The amp delivers exceptional power and transparency, making it ideal for critical listening, whether mixing or mastering. However, this level of quality comes with a steep price tag, which may be a barrier for some. For those willing to invest, though, the HPA4 is a long-term studio companion, combining elegance with exceptional functionality.

positive

Full Review

Benchmark HPA4 | The Ear

the-ear.net

A triumph of precision, Benchmark's HPA4 is an engineer's dream and an audiophile's delight. Its staggering specs, like ruler-flat frequency response and ultra-low distortion, set it apart. While its sterile accuracy might lack warmth for some, it offers unparalleled clarity and depth, making music feel exceptionally real. However, the need for careful component matching is a caveat. With its robust build and stellar performance, the HPA4 is a must-audition for those seeking sonic truth over colored playback. A compelling choice for high-end headphone amplification and line stage duties.

positive

Full Review

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Pricing and availability

Price History

Description

Owner's manual

Videos

Reviews

Owner Insights

Features and functionality

Comparisons

Use cases and applications

Critic Reviews

Benchmark HPA4 Review – The One to rule them All! - Soundnews

Benchmark HPA4 headphone amplifier/line preamplifier | Stereophile.com

Benchmark HPA4 Headphone/Line Amp Review - TapeOp | Tape Op Magazine

Benchmark HPA4

Benchmark HPA4 | The Ear

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