Tuesday 18 January, 2022

MATRIX M-stage Headphone Amp Amplifier OPA2134

This product was added to our catalog on Friday 28 December, 2012.

$254.90  $229.41
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M-STAGE HPA-1 through continuous improvement design, rigorous circuit design and high quality components selection, keep always high performance and quality. A new design of aluminium alloy profile type shell, increased the side a air guide groove, to ensure the stability of class A working status, make the headphones have best performance.


M - STAGE HPA - 1 designed for high impedance headphones, Class A working mode, has the drive ability, fidelity higher characteristic, high drive ability and fidelity, can easily drive all kinds of moving coil headphones, gain can be set to different impedance headphones.

Class A

Two analog input, can connect different equipment, one analog output can be used as a preamplifier. When insert headphone, output will automatically shut down.


High Quality Components


Use high quality metal film resistor, WIMA CBB, ALPS potentiometer, high quality ring seal power transformer, everything is for the perfect playback.

  • Pure Class A
  • Powerful output can driver high impedance headphones (up to 600 Ohms)
  • OPA2134 op-amps, ALPS VR, Nichicon capacitors
  • Gain selectors
  • 2 sets of line-in selectable on the front panel
  • 1 set of line-out can be used as a pre-amp output
  • Newly designed casing, more solid and durable
  • Newly designed Matrix toroidal transformer
  • Full size PCB and less power wire
  • Interference reduction


  • Frequency Response: 10 Hz (-0.3dB) ~ 35kHz (-1dB)
  • Signal to Noise Ratio: >95dB (0dB)
  • Distortion: <0.001% (6 mW/300 Ohms)
  • Input Impedance: 47 kOhms
  • Output Impedance: Line-out 60 Ohms, Phone-out 5 Ohms
  • Output Power: 200 mW/300 Ohms, 400 mW/60 Ohms
  • Power Support: AC 220-240V/100-120V 
  • Front Panel Color: Black/Silver
  • Weight: 2 kg
  • Device Dimension: 280 x 110 x 42mm

Package contents:

  • Matrix m-stage HPA x 1
  • Power cable x 1 (US/JP/UK/EU/AU )

  • Shipping Weight: 2kg
  • Manufactured by: MATRIX

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