Headphone & Balanced Line Output

Isolator is your 4 HP solution for galvanic isolation between its inputs and ¼ TRS balanced outputs, interfacing your Eurorack modular system without electric connection with the external equipment, which prevents possible ground loop issues.

If no signal is plugged to the right input, then the left input will be sent to both Left and Right outputs. “Level” knob adjusts output level for Left and Right channels, Phones knob sets the level for the headphones output.

http://happynerding.com/category/isolator/