GS-HA013 is a compact headphone amplifier with two balanced inputs and per-ear routing switches. It is intended for users who need to receive two signals and decide whether each one is heard in the left ear, right ear or both.

• Two balanced XLR inputs, with one input switchable to unbalanced stereo.
• Input gain controls and separate left/right headphone gain controls.
• Right-ear phase reverse switch.
• Two 6.35 mm headphone outputs and one 3.5 mm output.
• Power and low-battery LED indication.