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USB DAC Headphone Amplifier

Sony PHA1


  • High-Resolution Audio for uncompromised sound
  • Superior sound with a dedicated USB DAC amp
  • PCM support for pure quality
  • Wide frequency response for ultra clear harmonics

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High-Resolution Audio for uncompromised sound Experience digital music to the fullest with High-Resolution Audio. By capturing music at a higher rate than CD, increasing both audio samples per second and the bit-rate accuracy of each sample, High-Resolution Audio offers an uncompromised rendition of an artists' music. Savor every breath and subtle movement for a truly emotional experience.

Superior sound with a dedicated USB DAC amp With a dedicated USB DAC amp connecting your headphones and compatible PC, smartphone, or Walkman®, you'll enjoy higher-quality streaming of High-Resolution Audio. The amp takes over responsibility from your portable device for processing and converting digital data, then amplifies sound using its own integrated amplifier.

PCM support for pure quality Get close to the original source. Supporting data volume that's about 6.5-times that of CD (44.1 kHz/16 bit), PCM (Pulse Code Modulation) handles up to 192 kHz/24 bit for a sampling rate and bit depth capable of reproducing wave characteristics that are very close to the original analog wave. In addition to providing clear reproduction of high frequencies, PCM also enables subtle nuances and resonance to be expressed with high fidelity.

Wide frequency response for ultra clear harmonics The wideband frequency range-spanning 10 Hz to 100 kHz-is designed for today's broad variety of music styles. At the 100 kHz high end, you'll be able to enjoy vocal melodies, subtle audio harmonics and tonality in outstanding clarity, as well as feel sound beyond your natural hearing. This is especially relevant with High-Resolution Audio, which unlike CD and MP3 music, supports high frequencies up to 100 kHz for a more realistic, emotive sound.

High-quality dedicated digital-to-analog converter (DAC) Digital-to-analog conversion is required by any audio device to convert digital data (such as music files) into an analog signal (to drive headphones or speakers). However, all DACs are not the same. Many portable devices incorporate DACs based on whether they fit within space and other limitations, but the PHA-1A is a dedicated device consisting of a high-performance DAC and amplifiers with the sole purpose of handling audio. That's why listening through the PHA-1A provides an audio experience that far surpasses listening through the built-in DAC of a smartphone, iPhone/iPod, or PC.

High-quality components for pure sound The digital source is converted to a pure, high-quality audible with a 192 kHz/24 bit capable DAC (WM8790), low-distortion low-noise operation amplifier (LME49860), high-power output high-fidelity headphone amplifier (TPA6120), and OCL amplifier output stage using two power supply methods.

Portable, lightweight design with durability Small and light at about 5.29 ounces the PHA-1A has a rugged aluminum case to protect it from everyday knocks and shocks. Rounded edges make it easy to hold when out and about. Comes with a silicone band for comfortable carrying along with your Walkman®, Xperia , or iPhone.


  • High-Resolution Audio for uncompromised sound
  • Superior sound with a dedicated USB DAC amp
  • PCM support for pure quality
  • Wide frequency response for ultra clear harmonics
  • High-quality dedicated digital-to-analog converter (DAC)
  • High-quality components for pure sound
  • Portable, lightweight design with durability
Dimensions (W x H x D) Approx. 0.20" x 0.06" x 0.36"
Weight Approx. 1.59 oz
Impedance (Ohm) 8 -600
Frequency Response 10-100kHz
Volume Control Rotary
Usage Time Approx. 6 h
Charge Time Approx. 3.5 h
Accessories Digital cable for WALKMAN®, Digital cable for Xperia ; Silicone belt, Sheet

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Electronics can be large, heavy and expensive. You probably don't have the special tools or expertise needed to fix them in a crisis. If you can spare a few thousand dollars without batting an eyelash for new electronics should they break tomorrow, don't buy a warranty. But if you're like most of us, protect yourself by purchasing inexpensive extended warranties when you buy a new product and save yourself big money in the long run.