HPA-2 CLASSIC headphone amplifier is the improved model of HPA-2, the optimized circuit design, new style appearance, exquisite processing technology and excellent performance to make it better.


The high-brightness chamfering edge design of front panel, ultrahigh speeds revolving cutting tools elaborately carved out the mirror-like gloss edge on front panel, further improve the visual texture. The knurling design of volume knob to add the friction of the finger contact area can get better grip compare with polishing surface treatment, red mark on volume is more clear and distinguishable.


The new gain control function, switching the gain switch on the rear panel to adjust output gain, two sections gains to match different headphones.

The new design of USB module is used XMOS U series chip and CS4398 high-performance D/A chip, support PCM-24bit/192kHz and DSD-2.8MHz/5.6MHz signal playback, not only DoP and ASIO Native two DSD playback methods, but also can be used with the iOS and the most android devices.


Class A work mode can feature it easily to drive all kinds of low sensitivity dynamic headphones; can be used as a preamplifier. The headphone protection function and power on/off noise elimination function to prevent the wrong voltage to damage your headphones and brings you the better user experience.


Cherry-pick every components, the ALPS 27 type volume potentiometer, WIMA/Nichicon audio grade capacitances, audio dedicated power supply transformer, and precision non-inductive resistances, all of these selective components to ensure get the best playback performance from HPA-2 CLASSIC.

Matrix Audio HPA-2 CLASSIC Class A Headphone AMP & USB DAC

  • Line Output

    SNR: >-95dB at 20Hz-22kHz A-Weighting

    THD+N: <0.0017% at 1kHz 1Vrms A-Weighting

    Frequency Response: 20Hz-20kHz (+0.01dB/-0.04dB)

    Output Impedance: 51ohms


    Headphone Output

    SNR: >-95dB A-Weighting

    THD+N: <0.0017% at 300ohms 13mW 1kHz A-Weighting

    Frequency Response: 20Hz-20 kHz (+0.01dB/-0.04dB)

    Output Impedance: 10 ohms

    Output power: 110mW at 33ohms / 310mW at 300ohms / 160mW at 600ohms At THD+N=1%

    Gain: L=+6dB H=+15dB


    USB Input

    USB芯片: XMOS Asynchronous USB Audio class 2.0

    D/A芯片: CIRRUS LOGIC CS4398

    SNR: >-103dB A-Weighting

    THD+N: <0.0009% at 1kHz A-Weighting

    PCM SAMPLE RATE: 16-24 Bit/44.1kHz 48kHz 88.2kHz 96kHz 176.4kHz 192kHz



    System Support

    Windows 7/8/8.1/10 systems need to install the driver supplied

    Mac OS X 10.6.4 and above version have native support and do not require a driver

    Can be used with the most of android devices via the OTG cable

    Can be used with iOS devices via the Apple Camera Connection Kit.



    Power Voltage: 

    230V position is fit for AC220V-240V 50/60Hz

    115V position is fit for AC100V-120V 50/60Hz

    Power Consumption: <15W

    Fuse: AC250V/500mA 5×20mm



    Dimension: 280×120×47mm L×W×H (Including the protruding part)

    Weight: 1.22kg

    NOTE: For the purpose of improvement, specifications subject to changes without prior notice.



    Driver & Manual Disk: × 1

    Power Cord: × 1

    USB Cable: × 1


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