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Home  >  Headphone Amplifiers >  Item # SNPHA1A (MFR# PHA1A)
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PHA1A Portable Hi-Res DAC Headphone Amplifier - Silver
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Sony PHA1A Portable Hi-Res DAC Headphone Amplifier - Silver

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Condition: Brand new, USA Warranty
Enjoy improved sound from almost any digital source by sending the signal through the PHA-1A. Breathe new life into your collection of audio files, and fully appreciate the advantages of High-Resolution Audio. Just plug in and let the PHA-1A do its magic
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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.

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.

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.

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.


  • Compact and lightweight for easy portability and use
  • Hi-Res audio DAC/amplifier supports up to PCM 192kHz/24 bit
  • Direct Digital Connection for smartphones, DMPs, iOS devices, and PCs
  • Solid Sound: Wolfson DAC w/separate operational & headphone amps
  • Sleek and durable aluminum enclosure for dependable performance
  • Built-in Lithium-ion battery for up to 6 hours battery life
  • Charge the PHA-1A and a Walkman while listening (requires cable, sold separately)
  • Selectable gain supports headphone impedance from 8 to 600 Ohm
  • Includes: Micro-USB and digital cables for Walkman and Xperia
  • Securely fasten portable devices with included silicone belts (x2)



  • Distortion: 0.01% or less (1 kHz)
  • Frequency Response: 10 Hz - 100 kHz
  • Sampling Frequency: PCM (PC connection Maximum 384kHz/32bit)
  • Volume Control: Rotary


  • Case Type: Aluminum chassis
  • Impedance: Supported impedance: 8 - 600 Ohm (Normal - High)
  • Power On/Off: Integrated: Rotary power/volume knob
  • Type of Use: Portable and Home
  • Recharging Time: Approx. 3.5 hours (Connected to PC) Approx. 2 hours (Via AC-UD10, USB AC Adaptor, sold separately)

Inputs and Outputs

  • DC-In: Inputs (1): USB Micro-B input
  • Digital Audio Input(s): Inputs (2): USB Micro-B input (for Computer, Walkman, and Xperia), USB Standard type A (for iPod/iPhone/iPad)
  • Output(s): Output (1): Headphones (stereo mini-jack, only 3-pole supported)


  • Battery Charging (Approx): When connected to computer: Appox. 3.5 hours from empty to full When connected to AC outlet: Approx. 2 hours from empty to full
  • Battery Indicator: Red LED when charging
  • Battery Life (Approx): Approx. 6 hours
  • Battery Type: Built-in Lithium ion rechargeable battery
  • Output Power: Maximum output (when using built-in lithium-ion battery): Approx. 148mW+148mW (8 Ohms, 10% distortion); Approx. 80mW + 80mW (32 Ohms, 1% distortion); Approx. 26mW+26mW (300 Ohms, 10% distortion)
  • Power Source: DC 3.7 V: Built-in lithium-ion rechargeable battery DC 5 V: When charging via USB

Weights and Measurements

  • Dimensions (Approx.): 62 mm x 18.5 mm x 1490 mm (2.4" x .73" x .22")
  • Weight (Approx.): Approx. 5.11 oz. (145 g) - rechargeable battery included
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