Free UK DeliveryFinance at checkout30 Day ReturnsWorldwide DeliveryAudio Affair Facebook

Black Friday Price Promise

Audio Technica AT-PHA100 Portable Headphone Amplifier


. 0 Reviews . Write a Review

Found it cheaper? Click here. SKU: ATHPHA100
Ex VAT: £332.50

RRP: £449.00


A powerful, effective, high quality portable headphone amplifier, designed to offer better sound quality with headphones from your smartphone or portable high res player on the move.

Available - Ships within 2-3 days

Condition: Brand new in original retail packaging

Earn 399 loyalty points when you order this item.

Where did you Find It Cheaper?

Seen this item cheaper elsewhere? Send us the link below with your details and we'll come back to you ASAP with a better price if we can offer one!


Warranty length 2 Years
Brand Audio Technica

Tech Specs

- PC: Built-in USB port (USB 2.0)
- CPU: Intel Core2 2.2 GHz (or =)
- RAM: 32-bit 2GB, 64-bit 4GB 
- OS: Windows XP (32-bit)*, 7, 8, 8.1
- Mac OSX Mavericks (10.9) 


Max Output Level
- 16Ω: 100+100mW (10% 16Ω, THD)
- 32Ω: 80+80mW (10% 32Ω, THD)
- 300Ω: 10+10mW (10% 300Ω, THD)


- Freq Character: 10Hz – 100kHz (-1dB)
- S/N Ratio: 110 dB (A-weighted)
- THD: <=0.001% (32Ω 10mW output)
- Headphone Impedance: 10Ω - 300Ω


- Anlg: 3.5mm gold-plated stereo mini jack
- Digital: USB micro-B (ASRC)
- DSD: 128, DSD64 (Native/DoP): 24–32bit
- PCM: 384/352/192/176/96/88/48/44/32kHz
- Resolution Sampling Rate: 16 – 32 bit
- Output: 3.5mm gold-plated stereo mini jack


- PC: 5V DC, 500 mA bus system
- Battery: rechargeable lithium polymer
- Charging: Up to 10 hours (DC5V, 500mA)
- Life: Digital=6hrs/ analog=14hrs (JEITA)


- Operating Temp: 41–104°F (5°– 40°C)
- Dimensions (HWD): 27 x 77 x 116mm
- Weight: About 240g

Product Description

Audio Technica AT-PHA100 portable headphone amplifier features built-in USB DAC engineered using innovative, hand-selected audio components for superb sound reproduction. It is designed to be compact so that it is a similar size to a smartphone, however it still packs a powerful punch.

High-Res Audio

A built-in USB digital-to-analogue converter is incorporated to reproduce a higher clarity sound with less interference and extended volume range. Texas Instruments LME49720 op-amp suppresses distortion for crystal clear mid to high frequencies.


The ES9018K2M Reference used is a high-performance 32-bit, 2-channel audio digital-to-analogue converter. With patented HyperStream architecture and Time Domain Jitter Eliminator, it delivers a dynamic range of up to 127dB and –120dB of total harmonic distortion plus noise; a performance level that will satisfy the most demanding audio enthusiasts.

It can handle up to 32-bit, 384kHz PCM data via I2S, DSD-11.2MHz data as well as mono mode for highest performance applications. Both synchronous and ASRC modes are supported.

Ultra-Low Distortion

Compatible with PCM 384 kHz/32 bit and high fidelity DSD sources, the AT-PHA100 gives headphones a rich, detailed boost throughout the sonic range with ultra-low distortion. Specially selected, discrete circuitry enhances the resolution throughout the frequency range.


The headphone amplifier is equipped with both analogue and digital inputs. There is a 1m USB cable (USB 2.0 to USB micro-B) and a 10cm audio cable terminated with 3.5mm gold-plated stereo mini plugs at each end.

Premium Finish

The design of the AT-PHA100 features a high/low gain switch, five-stage sampling indicator for digital input and machined aluminium volume knob for a premium finish effect.

On-the-Go Portability

Audio Technica have smartly included two rubber bands and a rubber mat for securing the amp to a smartphone or portable audio device. The internal rechargeable lithium polymer battery lasts up to 14 hours when amplifying an analogue signal and up to 6 hours for a digital signal.

Key Features

- Built-in USB DAC for less interference and extended volume range
- NJR MUSES 8832 preamp delivers rich, powerful sound from low/high frequencies
- DAC ESS ES9018K2M circuit samples 32-bit PCM/DSD sources at 2.8/5.6MHz
- Texas Instruments LME49720 op-amp suppresses distortion for crystal clear mid to HF
- Internal rechargeable lithium polymer battery lasts up to 14 hours
- All-aluminium enclosure protects delicate circuitry

Write Your Own Review

Write a Review

  • 1 star 2 stars 3 stars 4 stars 5 stars
    1 Star 2 Star 3 Star 4 Star 5 Star