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Line to modular conversion, and modular to line/headphone conversion
Works with guitars, table-top synths, effect pedals, keyboards, groove boxes, and many microphones
Dual mono or stereo conversion
LEDs show signal level and clipping
Gain knob allows for wide range of boost or cut
The 4ms Company Listen IO is a simple module which gets signals in and out of a Eurorack system by converting to and from normal modular levels. The top section converts any external signal to modular levels by providing up to 30x gain (+30 dB), allowing you to use table-top synthesizers, keyboards, phones/tablets, computers, toys, microphones, etc. in your patches. The bottom section does the opposite: modular signals are converted to normal line level signals. The bottom two jacks can be used as line outs or as headphone jacks, so you and a friend can listen in stereo at the same time.