Benchmark Media Systems HPA4 Headphone Amplifier and Preamplifier
Best reference amplifier for audiophiles demanding absolute signal transparency and power.
This is the ultimate reference tool for those who demand absolute transparency and zero coloration in their signal chain. By integrating THX AAA technology, it effortlessly tames even the most power-hungry planar headphones, though its clinical, surgical precision may prove too revealing for listeners who prefer a warmer, more forgiving sound signature.
$3599.00
at
Sound Pure
Who it's for
- Audiophiles seeking absolute sonic accuracy and detail
- Listeners needing a high-end preamp and headphone amp combo
- Users requiring perfect channel balance at any volume level
Who should skip it
- Budget-conscious buyers looking for entry-level audio gear
- Listeners preferring the colored warmth of tube amplifiers
- Casual listeners with modest setups seeking value over precision
Performance breakdown
Signal Transparency
Industry-leading noise floor ensures absolute sonic purity and zero coloration.
Drive Capability
Effortlessly powers even the most demanding planar magnetic headphone loads.
Volume Precision
Relay-controlled gain offers granular, perfectly matched steps for every listening level.
Build Integrity
Milled aluminum construction provides a robust, professional-grade chassis for long-term reliability.
Interface Usability
Touchscreen navigation makes source selection and system adjustments intuitive and fast.
System Versatility
Comprehensive I/O options allow seamless integration into complex high-end audio chains.
Key Specs
Form Factor
2U half-width rackmount
Amplifier Technology
THX AAA
Inputs
2x Stereo Balanced XLR, 2x Stereo Unbalanced RCA
Outputs
L/R XLR, L/R RCA, Summed (L+R) mono output
Headphone Outputs
1x 1/4" TRS, 1x XLR4
Number of Headphone Outputs
2
Frequency Response
0.1 Hz to 500 kHz
Signal-to-Noise Ratio
> 135 dB
Total Harmonic Distortion (THD)
< 0.00006%
Max Output Power
6 watts into 16 ohms
What Reviewers Say
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