Power Holdings Inc is an international consumer audio product development and distribution company. We specialize in marketing high end audio components and accessories to music enthusiasts in North America.
Explore Our Products
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⁺!
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.
Excellent structural design to quickly dissipate the heat of power transistors 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.
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.
>-112dB @ 20Hz-22kHz A-Weighting
<0.0003% @ 1kHz 1VRMS A-Weighting
<0.0003% @ 33ohms 90mW 1kHz A-Weighting
2800mW @ 33ohms / 420mW @ 300ohms / 210mW @ 600ohms @ THD+N=0.01%
5=5dB 10=10dB 20=20dB
XMOS U-Series Asynchronous USB Chip
CIRRUS LOGIC CS4398
<0.0009% @ 1kHz A-Weighting
16-24Bit/44.1kHz 48kHz 88.2kHz 96kHz 176.4kHz 192kHz
DSD2.8MHz/DSD5.6MHz (DoP and ASIO Native)
Windows XP/Vista/7/8/8.1 systems need to install the driver suppliedMac OS X 10.6.4 and above version have native support and do not require a driverCan be used with the most of Android devices via the OTG cableCan be used with iOS devices via the Lightning to USB Camera Adapter
Power & Accessories
230V position is fit for AC220V-240V 50/60Hz115V position is fit for AC100V-120V 50/60Hz
Driver & User Manual Disk x1 Power Cord x1 USB Cable x1
285×142×49mm L×W×H (Including the protruding part)
Welcome to Power Holdings Inc! We have been in business since 2008 providing audiophiles with equipment and customer service that we are proud of. Our brands are sold throughout the USA and Canada both online and in retail stores. Please see our list of AUTHORIZED RESELLERS to find a dealer near you. You can also purchase these products on this website. If you have any questions please feel free to CONTACT US.
Enjoy the music, Arthur G H Power IV