Audio-Technica AT-BHA100 Balanced Headphone Amplifier

A tube hybrid desktop amp for headphones from 16-600 ohm impedance.

The AT-BHA100 balanced headphone amplifier is ideal for use with hi-fi headphones such as the ATH-ADX5000, ATH-MSR7b, and those in the ATH-AW Series. This compact desktop unit is also a great match for the AT-DAC100 desktop DAC which is tuned specifically for a tube preamp.

The AT-BHA100 hybrid system uses vacuum tubes and power transistors in four completely independent amplifier circuits. High-end components include a New Japan Radio MUSES8820 operational amplifier, and specially designed low-noise relay switches. A four-layer board structure with high-quality audio-grade components from Nichicon, WIMA, and Shinyei Capacitor ensures rich, natural audio.

Outputs include a  4.4 mm TRRS jack and a 4-pin XLR terminal, plus a low/high gain selector switch, allowing it to accommodate a wide range of balanced headphones. It also has two 6.3 mm (1/4″) outputs with independent volume controls that can be used simultaneously for comparative listening.

Specifications

Required Headphone Impedance: 16 – 600 ohm

Maximum Output Per Channel (mW)
6.3 mm (16, 32, 64, 600 ohm):  680, 320, 240, 30 
Balanced (16, 32, 64, 600 ohm): 1,500, 1,200, 800, 120

Gain (High, Low)
6.3 mm: 10 dB, 1.5 dB
Balanced: 16 dB, 7 dB 

Inputs: 2 x stereo RCA, 2 x XLR 

Outputs: 2 x 6.3 mm, XLR, 4.4 mm, stereo RCA line 

Dimensions (HWD): 1.73″ x 8.27″ x 10.47″ (44 × 210 × 266 mm)

Weight: 63.5 oz (1.8 kg)

Included Accessories: AC adapter, power cable, feet, stand