Doepfer A-139 Headphone Amplifier (no longer available) - Manual

doepfer System A - 100 Headphone Amplifier A-139
1
1. Introduction
Module A-139 is a stereophonic headphone ampli-
fier.
One or two stereo headphones with 6.3mm (1/4”)
stereo jack plugs can be connected to the A-139. The
minimum headphone impedance is 8 Ohm.
The levels of the audio signals connected to the audio
inputs can be adjusted separately for each input.
The Master Level knob controls the overall loudness
for both channels.
The maximum power output is 2 x 1.5 W.
A-139
Head Phone Amplifier
Master
Level
Lev. 2
Lev. 1
Input 1
Input 2
Head
Phone