Headphone preamplifier with lithium battery USB - ALCTRON HA 106

The HA 106 is a 19" 4-channel rack-mountable headphone pre-amplifier. It has 4 stereo jack inputs and outputs for headphone on the front panel and 4 line left / right mono jack inputs on the rear panel. For the 4 front inputs, you can select the output signal using a push button, and also adjust the headphone volume. Technical specifications:

Audio inputs:

• Connections: balanced 6.35 mm jack sockets
• Impedance: 47 kohms
• Max. input level: +25 dB
• Gain level: +35 dB

Headphone amp output level:

• Max. output level: 300 m W @ 32 ohms (max 1 W @ 32 ohms)
• Output impedance: 22 ohms
• Max. gain: +20 dB

Power supply: mains 200 - 240 V∿ 50/60 Hz

Other parameters:

• Distortion: 0.02%
• Frequency response: 20 Hz - 20 kHz
• S/N ratio: >80 dB
• Brushed aluminum finish
• Dimension: 482.6 x 217 x 44.5 mm
• Weight: 3.2 kg