Matrix M-Stage HPA-3U Class A Headphone Amplifier + USB DAC Decoder

SKU: FN321
Price: US$ 419.98
In Stock - Shipping within 48 hours Worldwide Free Shipping
  • THD+N<0.0003%
  • Best Selection Best Match
  • Revolutionary Improvement
  • High Resolution Format Compatibility



Revolutionary Improvement
HPA-3U is a biggest evolution since the M-Stage series headphone amplifier came out, the new appearance, the new circuit design and radical performance improvement to make it all difference.


Full-band of THD + N less than 0.0003%, SNR up to -112dB, bandwidth not less than 150k at -3dB gain, 0.2Ω ultra low output impedance, three gain level options to fit for the different impedance and sensitivity headphone, all of these excellence performance improvements to be born the brand new HPA-3U!

High Resolution Format Compatibility
The most stable XMOS U series USB controller on the new USB module, support 24 bit/192kHz sample rate PCM signal playback, DOP mode DSD playback capacity, the biggest bright spot is that can be played with your iOS and the most Android devices.

Brand New
Excellent structural design to quickly dissipate the heat of power tube via the shell, to ensured the stability of the work; full symmetric circuit layout makes two channels audio have the isometric path; driver stage use the precision constant current source and establish stable working point; Parallel output of the output stage can effectively reduce the output impedance, and improved driving capability, extended dynamic range.

Best Selection Best Match
Alps 27 series volume potentiometer, Wima and Nichicon audio gradecapacitors, Noratel toroidal transformer, precision non-inductive resistance, each carefully selected components make HPA-3U not only presents the perfect sound, but also a more stable and reliable.



Line Output
SNR: >-112dB at 20Hz-22kHz A-Weighting
THD+N: >0.0003% at 1kHz 1VRMS A-Weighting
Frequency Response: 20Hz-20kHz(+0.01dB/-0.04dB)
Output Impedance: 51ohms

Headphone Output
SNR: >-112dB A-Weighting
THD+N: <0.0003% at 33ohms 90mW 1kHz A-Weighting
Frequency Response: 20Hz-20kHz(+0.01dB/-0.04dB)
Output Impedance: 0.2ohms
Output Power: 2800mW at 33ohms / 420mW at 300ohms / 210mW at 600ohms at THD+N=0.01%

Gain Control
Gain: 5=5dB 10=10dB 20=20dB

USB Input
USB Chip: XMOS U-Series Asynchronous USB Chip
D/A Chip: Texas Instruments DSD1793
SNR: >-110dB A-Weighting
THD+N: <0.002% at 1kHz A-Weighting
PCM Sample Rate: 16-24Bit /44.1kHz 48kHz 88.2kHz 96kHz 176.4kHz 192kHz
DSD Sample Rate: DSD64(DoP)
System Support: Windows XP/Vista/7/8/8.1 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 Lightning to USB Camera Adapter


Power Voltage: 230V position is fit for AC220V-240V 50/60Hz
115V position is fit for AC100V-120V 50/60Hz
Power Consumption: <25W
Fuse: AC250V/500mA 5×20mm

Dimension: 285×142×49mm L×W×H(Including the protruding part)
Weight: 1.7kg


1 x M-Stage HPA-3U
1 x USB Cable
1 x Power Cord
1 x Driver&User Manual Disk

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