Discontinued Product

Sony Portable Hi-Res DAC/Headphone Amplifier - PHA3

Product Details

Sony Portable Hi-Res DAC/Headphone Amplifier - PHA-3

Listen to highly detailed audio with this Sony Hi-Res portable DAC/headphone amplifier. It connects to your digital music device or PC to decode a wide range of Hi-Res PCM audio file formats so that you can enjoy 24-bit music from virtually any device via USB or microUSB. The high-quality application circuits produce impressive signal and performance with virtually no distortion, low noise and a high slew rate so that it can produce up to 120dB of dynamic range, letting you play your music as loud as you like with exceptional detail.

This Sony amplifier also ensures ultra-smooth thanks to the asynchronous USB 2.0 clock. This lets it reduce timing inaccuracies as it converts digital into analog waveforms and supports highly accurate overall digital signal conversion. All this technology is encased in a compact aluminum enclosure that keeps this Sony digital amplifier and everything within safe. Alloy bumpers prevent the volume knob from being affected by impacts. When you're out and about, this Sony Hi-Res portable DAC/headphone amplifier has a six-hour battery life to keep your music playing.


  • Enjoy music as the artist intended with High-Resolution Audio
    Take your digital music collection to another level with High-Resolution Audio. By capturing music at a higher rate than CD (up to 384 kHz/32-bit, rather than 44.1 kHz/16-bit), High-Resolution Audio allows you to get closer to the original studio recording and enjoy your music just as the artist intended.
  • 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.
  • Full support for DSD and PCM encoding
    With support for both DSD (Direct Stream Digital) and 384 kHz/32-bit PCM (Pulse Code Modulation) encoding formats, you’ll enjoy authentic, original sound that’s closer to the original studio recording. Both formats digitize the analog source: DSD captures sound data as a sequence of single bit values (including 192 kHz/24 bit, DSD2.8, DSD128, and DSD64) with a high sampling rate of up to 5.6 MHz (128 times the sampling rate of CD). While PCM digitally samples the original audio source, then converts the signal into binary digits called ‘bits’.
  • Multi-connections for versatile listening
    Be well-connected with this USB DAC amplifier. Two Micro USB ports let you charge the device through one, and connect to your Xperia™ smartphone, Walkman®, and PC. There’s also an optical connector supporting up to 192 kHz/24 bit PCM input — ideal for hooking up to an AV receiver. Plug in through a stereo input, or use the supplied balanced cable to plug in through a balanced audio mini jack. Left and right inputs ensure rich, balanced sound.
  • 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. 
  • Upscale MP3 tracks with DSEE-HX
    Go beyond CD quality. DSEE HX builds on our proprietary DSEE technology, upscaling compressed audio files to a level that’s closer to High-Resolution Audio. By restoring the subtleties of the original recording that are lost during the compression process, DSEE HX is able to deliver a rich, studio-quality audio experience.
  • Balanced audio cuts cross-talk
    With a supplied balanced 4-wire connection and silver-copper dual cord, audio channel separation is improved for better sound. Unlike conventional headphone cords, which share a ground wire, this cord includes left, right and independent ground wires for both channels, so you hear less distortion and cross-talk.
  • Ready to go with a range of cables
    Everything is supplied in the box to get you going, including digital cables for Apple and Walkman® devices, a Micro USB cable for Android and Xperia devices, analog cable for MP3 players, USB charging cable and a silicon band for easily attaching the amp to your music player.


  • Impedance (OHM): 8–600 Ω
  • Frequency Response: 10–100 kHz (AUDIO IN)
  • Volume Control: Rotary volume
  • Usage Time: Digital (balanced connection) Approx 5 hours
  • Charge Time: Approx 15 hours (PC connection)

In The Box:

  • Digital cables for Walkman and Xperia, (1) micro-USB cable, (1) stereo mini cable, (1) silicone belt, and (1) Protection sheet.
  • (1) Interoperability and compatibility among Apple devices may vary.
  • (2) Actual battery performance varies based on settings, environmental conditions and usage. Analog connection provides approx. 17 hours of use and digital connection provides approx. 6.5 hours of use.

Approximate Dimensions:

  • Height: 1.14"
  • Width: 3.15"
  • Depth: 5.53"

Approximate Weight:

  • Unit: 10.58 oz
  • Shipping: 2 lbs

Warranty Information:

  • Manufacturer Warranty (authorized online retailer): One Year Parts and Labor
California customers: Proposition 65 WARNING - learn more
Key Features
High-Resolution Audio Capable/ DSEE HX Digital Amplifier/ Drive Headphones With More Power Than Portable Devices/ Pulse Code Modulation 16/24/32bit/ Direct Stream Digital/ Ultra High Frequencies Up To 100 kHz./ Compatible With USB Audio, PCM 384 kHz/32-bit, DSD/ Supplied With Balanced Cable For Clear, Precise Sound/ Black Finish
More reasons to buy the Sony Portable Hi-Res DAC/Headphone Amplifier PHA3 from Abt Electronics
  • Abt.com is an authorized dealer (Learn More).
  • The Sony Portable Hi-Res DAC/Headphone Amplifier PHA3 is Brand New.
  • The Sony Portable Hi-Res DAC/Headphone Amplifier PHA3 Ships in a Factory Sealed Box.
  • Abt ships this product for free!
TypeHeadphone Amplifier
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