MATRIX M-STAGE HPA-3U+ Class A USB DAC DSD Headphone Amplifier

MATRIX M-STAGE HPA-3U+ Class A Balanced Headphone Amplifier

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365,83 €tax excl.

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Shipping date: 17-07-2019.

Orders placed before 1pm (GMT+1) will be shipped the same day (working day).

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Matrix Mstage HPA 3U+The Matrix M-Stage HPA -3U + is an evolution of the famous class A amplifier of the brand with an audio converter and an input USB. This amplifier is completely redesigned and optimized to offer even more music to the enthusiast.

Equipped with a front gain selection on three levels, you benefit from a perfect match of impedance on any sedentary top-of-the-range headphones. Many technological points are improved making this USB headphone amplifier even more attractive:

  • New aluminum chassis design
  • 4 transistors per side polarized Class-A with shorter circuit
  • Parallel circuit improving crosstalk
  • Lower output impedance (line 51 Ohm, headphone 0.2 Ohm)
  • Extended Dynamics (112dB)
  • Potentiometer ALPS series RK27
  • Wima and Nichicon Capacitors of Audiophile Quality
  • Resistors non-inductive film
  • Toroidal transformer Noratel anti-static and low radiation screen

This DAC USB preamplifier is the ally helmetstop of the lineincluding the AKG 702 series and Beyerdynamic. It will bring finesse, vibrant and a most seductive balance.

Connections and functions Matrix Mstage HPA-3U +

Matrix Mstage HPA 3U+

  • A: USB input 24 bit 192khz
  • B: Analog stereo RCA input
  • C: Analog stereo RCA output
  • D: Power button
  • E: 230V mains input

Matrix Mstage HPA 3U+

  • A: Headphone output 6.35mm
  • B: Start-up LED
  • C: USB input selector (U) or analog (A) stereo RCA
  • D: gain stage selector from 5dB up to 20dB
  • E: Potentiometer knob for volume
  • F: LED indicating the functioning of the DSD

Qobuzissime for the Matrix M-Stage HPA-3U
(Review by Qobuz)

" The headphone amplifier with DAC M-Stage HPA-3U is a very nice device, which has a big mouth and looks indestructible. Using high quality components, it offers first-class sound quality and is full of power. "
Test Qobuz et Qobuzissime

Features:/ Strong>

Line Output (RCA):

  • ReportNoise signal> -112dB Class A
  • Total harmonic distortion + N <0.0003% at 1kHz
  • Frequency response: 20Hz-20kHz (+ 0.01dB / -0.04dB)
  • Output Impedance: 51 Ohms
  • Output power: 2800mW at 33ohms / 420mW at 300ohms / 210mW at 600ohms with a THD + N = 0.01%

Output Headphone asymmetrical (jack 6.35):

  • Signal-to-noise ratio> -112dB A-weighted
  • Total harmonic distortion <0.0003% at 33ohms 325mW 1kHz Class A
  • Frequency response: 20Hz-20kHz (+ 0.03dB / -0.1dB)
  • Output Impedance: 0.2ohms
  • Output power: 2100mW at 33ohms / 430mW at 300ohms / 220mW at 600ohms at THD + N = 0.01N

Front Gain Adjustments:

  • Gain: 5 = 5dB 10 = 10dB 20 = 20dB


  • USB Chip XMOS U8-Series Asynchronous Chip conversion CIRRUS LOGIC CS4398 24bit 192khz
  • PCM Sample Rate Compatible: 16-24Bit /44.1kHz 48kHz 88.2kHz 96kHz 176.4kHz 192kHz
  • Sample rate DSD compatible: DSD2.8MHz / DSD5.6MHz (DoP and Native ASIO)

System Support:

  • Windows XP / Vista / 7/8 / 8.1 driver required provided
  • Mac OS X 10.6.4 and above compatible without driver
  • Can be used with an OTG-compatible Android smartphone
  • Can be used with a smartphone or an iOS tablet via Lightning adapter to USB camera adapter


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  • Fuse: AC250V / 500mA 5x20mm


  • Dimensions: 285 × 142 × 49mm
  • Weight: 1.7kg

Accessories :

  • Power cord × 1
  • USB cable x1

Circuit class A MAtrix Mstage HPA-3U +

Data sheet
InputUSB 2.0
OutputJack 6.35mm
Max sampling rateDSD128
Max sampling rate192kHz
Components / ChipCS4398
ConnectionTo connect
Channel2 channels (Stereo)
ClassClass A / AB
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