Portable (USB) Headphone Amplifier

$599.99 U.S. List Price


The PHA-1 portable headphone amplifier is a two-channel high resolution DAC (digital-to-analog converter) combined with a high-quality headphone amplifier.The PHA-1's micro USB port is USB audio compatible (96kHz/24bit) and it supports asynchronise data transfer mode. It doesn't require the use of addtional drivers for use with MAC or PC. It's durable metal construction, high quality components and outstanding sound quality make it ideal for use with MDR series professional headphones.


  • Micro USB port (for PC/MAC use) operates using USB bus powering
  • Professionally constructed in a durable aluminum enclosure with zinc alloy cast bumpers to minimize external interference and protect the volume control
  • High slew rate Texas Instrument TPA6120 headphone amplifier
  • Supports headphone impedances of 8 ohms to 600 ohms
  • Ultilizes high quality Wolfson WM8740 digital-to-analog converter
  • Maximum audio sample rate and resolution: 96 kHz / 24 bit
  • Built-in Lithium-ion battery (charged from Micro USB port). Battery life 10 hours using analog input or 5 hours when connected directly with an iPod/iPhone/iPad. Charge time 4.5 hours.
  • Side panel gain switch supports use with both high and low impedance headphones
Features Benefits:
Analog input Stereo mini jack provides analog input directly to the analog headphone amplifier
Specs for analog input Frequency Response: 10 Hz - 100 kHz. Signal to Noise Ratio: 110 dB. Headphone Power Output: 175mW + 175 mW @ 16 ohms, 125 mW + 125mW @ 24 ohms
USB Audio input Micro-USB (TYPE B) connector (USB adapter cable supplied)
Specs for USB Audio input Up to 96 kHz / 24-bit. Frequency Response: 10 Hz - 47 kHz . Signal to Noise Ratio: 96dB. Headphone Power Output: 40mW + 40mW @ 16 ohms, 70mW + 70mW @ 24 ohms
iPod/iPhone/iPad input USB Type A connector dedicated for iPod/ iPhone/ iPad use (USB adapter cable supplied)
Specs for iPod/iPhone/iPad input Up to 48 kHz / 24-bit. Frequency Response: 10 Hz - 23 kHz. Signal to Noise Ratio: 96dB. Headphone Power Output: 175mW + 175mW @ 16 ohms, 125mW + 125mW @ 24 ohms

Supplied Accessories

Model: Description: U.S. List Price:
Micro-USB Cable
30-Pin USB Cable
Stereo Mini Cable
Audio Cable for "WALKMAN"
Sliicone Belts (4)
Protection Sheet

Product Information Document

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Product Manual

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