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Audio-Technica® AT-PHA100 Portable Headphone Amplifier-AT-PHA100

Model #: AT-PHA100
At a Glance

Audio-Technica® AT-PHA100 Portable Headphone Amplifier with discreet circuitry and almunim volume knob

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You don’t have to settle for wimpy, muddy sound just because you’re on the go. The AT-PHA100 Portable Headphone Amplifier is small (width and length comparable to a smartphone) but packs a powerful punch. Engineered using select audio components, and enclosed in all-aluminum casing to protect the circuitry, the AT-PHA100 gives headphones a rich, detailed boost throughout the sonic range with ultra-low distortion.

The AT-PHA100 is equipped with both analog and digital inputs (3.5 mm jack and USB micro-B, respectively) and 3.5 mm headphone jack. It also features a high/low gain switch, machined aluminum volume knob, and five-stage sampling indicator for digital input. The internal lithium polymer rechargeable battery lasts up to 14 hours when amplifying an analog signal, and up to 6 hours when amplifying a digital signal.

The amplifier comes with two rubber bands and a rubber mat for strapping the unit to a smartphone or other portable device, a 1.0 m USB cable (USB 2.0 to USB micro-B) and a 10 cm audio cable terminating in a 3.5 mm gold-plated stereo mini plug at each end.

  • Specially selected, discrete circuitry enhances the resolution throughout the frequency range
  • NJR MUSES 8832 pre-amp delivers rich, powerful sound from low to high frequencies
  • DAC ESS ES9018K2M circuit samples 384kHz/32-bit PCM, and DSD audio sources at 2.8/5.6MHz
  • Texas Instruments LME49720 op-amp suppresses distortion for crystal clear mid to high frequencies
  • Internal rechargeable lithium polymer battery lasts up to 14 hours
  • High/low gain switch and machined aluminum volume knob
  • Five-stage sampling indicator (for digital signal input)
  • All-aluminum enclosure protects delicate circuitry
  • Includes two rubber bands and a rubber mat for strapping amp to a portable device, a 1.0 m USB cable (USB 2.0 to USB micro-B) and a 10 cm audio cable with 3.5 mm mini plugs
Useful Documents

Additional Specifications

System RequirementsPC: with built-in USB port corresponding to USB 2.0
CPUIntel Core2 CPU2.2 GHz or equivalent
RAM32-bit OS 2 GB or more, 64-bit OS 4 GB or more
Supported OSWindows XP (32-bit)*, Windows 7, Windows 8, Windows 8.1, Mac OSX Mavericks (10.9)
Corresponding Headphone Impedance10 – 300 ohms
Maximum Output Level100 mW + 100 mW (10% during 16 ohms, THD), 80 mW + 80 mW (10% during 32 ohms, THD), 10 mW + 10 mW (10% during 300 ohms, THD)
Frequency Characteristic10 Hz – 100 kHz (-1 dB)
Signal-to-noise Ratio110 dB (A-weighted)
Total Harmonic Distortion<=0.001% (32 ohms 10mW output)
Input ConnectorAnalog: 3.5 mm (1/8") gold-plated stereo mini jack
DigitalUSB (micro-B)/asynchronous mode/ DSD128 (DoP), DSD64 (Native / DoP): 24 – 32 bit/ PCM 384kHz, 352.8kHz, 192kHz, 176.4kHz, 96kHz, 88.2kHz, 48kHz, 44.1kHz, 32kHz: 16 – 32 bit
Output Connector3.5 mm (1/8") gold-plated stereo mini jack
Power Supply5V DC, 500 mA bus power system (PC)/rechargeable lithium polymer battery (BATTERY)
Charging TimeUp to 10 hours (DC5V, 500mA)
Battery LifeDigital about 6 hours (JEITA) / analog about 14 hours (JEITA)
Operating Temperature41 – 104° F (5° – 40° C)
Dimensions (excluding protrusions)1.1" (27 mm) H × 3.0" (77 mm) W × 4.6" (116 mm) D
WeightAbout 240 g
Accessories Included1.0 m USB cable (USB 2.0 to USB micro-B), 10 cm audio cable (3.5 mm gold-plated stereo mini plugs x 2), rubber mat, two rubber bands
Common spec for analog/digital without annotationFs=384 kHz, 32-bit for digital input

Misc. Specs

Depth (in.)4.6
Height (in.)1.1
Frequency Response10 Hz – 100 kHz (-1 dB)
Width (in.)3
Manufacturer Warranty1 Year
Headset JackYes
Product Weight0.53
WarningProposition 65 Warning for California Residents