Sony PHA-3 High-Resolution USB CAC Digital Sound Source Portable Headphone Amplifier

SKU: FN126
Price: US$ 969.98
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  • Flexible connectivity
  • Balanced Audio capable
  • High-quality amplification circuitry
  • Portable Hi-Res DAC/Headphone Amplifier


Portable Hi-Res DAC/Headphone Amplifier
Enjoy your favorite music with convenient Analog and Digital connectivity that lets you maximize your audio experience no matter the source: smartphone, portable audio player, PC or even other analog devices. The internal battery delivers up to 5 hours battery life while the internal DAC can decode PCM audio up to 384 kHz/32-bit and DSD files at 2.8/5.6MH, while dedicated high fidelity circuitry ensures bit-perfect playback.



Unlock Hi-Res audio

The PHA-3 portable headphone amplifier delivers a high-resolution audio experience through your headphones. The PHA-3 can comprehensively decode PCM audio sources up to 384 kHz/32-bit in addition to DSD audio sources at 2.8 MHz / 5.6 MHz formats.

Flexible connectivity

With flexible connectivity the PHA-3 is much more than just a headphone amplifier. While the analog input provides easy plug-play connectivity with most MP3 players, smartphones and other audio devices, digital (USB) inputs including an optical terminal let you maximize your audio experience and enjoy high-resolution files stored on compatible: PCs, digital music players, Smartphones and the like. Perfect for interfacing with an external amp or active speakers, an analog audio output is available.

Balanced Audio capable

As with a home stereo, you generally need to connect a pair of speakers, each one separately, to an amplifier. For the ultimate headphone experience, similar separated left and right channel audio connectivity can be used. Balanced audio output, results in an optimized listening experience, and in the case of the PHA-3 renders optimal audio performance when using compatible headphones such as the MDR-Z7 or XBA-Z5 headphones.

Jitter-free audio

The PHA-3 features an asynchronous USB 2.0 clock that supports highly accurate DA conversions. The precision clock signal generator reduces timing inaccuracies when converting digital signals into analog waveforms. This maintains sound stage integrity and audio response, resulting in superior audio performance with minimal noise and distortion.

High-quality amplification circuitry

Not only can the PHA-3 decode PCM audio up to 384 kHz/32 bit & DSD audio at 2.8 / 5.6 MHz, but in partnership with the ES9018 DAC and high-bandwidth OPA2604 headphone amp, it can deliver outstanding signal/noise performance up to 130 dB of dynamic range that will breathe new life into your favorite tracks.

Maximize your music

Enjoy optimal audio performance with Sony-unique DSEE HX technology. DSEE-HX revitalizes high-frequency audio response while also up-scaling existing audio signals (MP3, AAC, ATRAC, and WMA) to high-resolution levels.

Durable construction and materials

An extruded aluminum enclosure fits nicely in-hand and also protects the delicate circuitry inside from outside interference and impacts, while integrated, front and rear alloy endcaps protect the terminals from hard knocks. Recessed controls also reduce the chance of accidental access during playback.

Rechargeable Lithium-ion battery

The internal rechargeable battery provides up to 5 hours of balanced audio playback when connected digitally via USB, or up to 28 hours of playback when connected using the analog, 1/8” stereo input.(2)




Brand: Sony
Condition: Brand-new
Frequency Range: 10 Hz – 100 kHz (AUDIO IN input) , Distortion 0.01 % or less (1 kHz)
Supported impedance: 8 Ω - 600 Ω
Maximum input: 2 Vrms (AUDIO IN)

Maximum output: 
Balanced connection: Approx. 320 mW + 320 mW (32 Ω, 1 % distortion), 
Normal connection: Approx. 100 mW + 100 mW (32 Ω, 1 % distortion)
Output jack: 3-pole mini jack (BALANCED - Left / Right), Stereo mini jack (- NORMAL)

Input jack/port: 
Computer/Walkman®/Xperia™ connecting port, iPhone/iPad/iPod connecting port, 
Optical input connecting port (OPT IN port), Stereo mini jack*1, *1 Only a 3-pole stereo mini plug is supported. 
Other plugs, including 2-pole mini plug or 4-pole stereo mini plug, are not supported.

Power: DC 3.7 V: built-in lithium-ion rechargeable battery, DC 5 V: when charging via USB
Dimensions: Approx. 80 x 29 x 140.5 mm (W/H/D, projecting parts are not included)
Weight: Approx. 300 g
Supported sampling frequencies / bit:
PCM: when connecting a computer: Max. 384 kHz/32 bit, when connecting iPhone/iPad/iPod: Max. 48 kHz/24 bit, when connecting optical link: Max. 192 kHz/24 bit; DSD: 2.8 MHz, 5.6 MHz


PHA-3 Head-Amp * 1
Silicone Belt * 4
Pretection Sheet * 1
Micro-USB Cable * 1
Stereo Mini Cable * 1
Xperia Digital Cable * 1
WALKMAN® Digital Cable * 1

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