Matrix Audio HPA-3U User Manual
HPA-3U
EN
Manual
www.matrix-digi.com
Over view
HPA-3U is a biggest evolution since the M-Stage series headphone
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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
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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!
The most stable XMOS U series USB controller on the new USB module,
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support 24 bit/192kHz sample rate PCM signal playback, DOP method DSD
playback capacity, the biggest bright spot is that can be played with your
iOS and the most Android devices.
Excellent structural design to quickly dissipate the heat of power tube via
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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.
ALPS 27 series volume potentiometer, Wima and Nichicon audio grade
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1
Over view
capa ci t or s , Nor ate l toroi dal tran sfo rme r, pre c is i on no n-i ndu cti ve
resistance, ever y carefully chosen components to make HPA-3U not only
presents the per fect sound, but also a more stable and reliable working
status.
2
The Front Panel
Headphone Jack
Power LED Indicator
DSD LED Indicator
Input Source Switch
Gain Switch
Volume Knob
3
The Rear Panel
USB Input
Left Channel Analog Input
Right Channel Analog Input
Left Channel Analog Output
Right Channel Analog Output
Power Switch
AC Power Input
4
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