4ms
The 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 (+30dB), 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.
4ms Listen IO
Regular price
$125.00
4ms Listen IO
The 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 (+30dB), 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.
Each section has two inputs and outputs for use with a stereo signal or two mono signals. An LED bar graph for each output shows the signal level and clipping.
Listen IO features:
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Line to modular conversion, and modular to line/headphone conversion
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Works with guitars, table-top synths, effect pedals, keyboards, groove boxes, and many microphones
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Dual mono or stereo conversion
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LEDs show signal level and clipping
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Gain knob allows for wide range of boost or cut
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Headers in back for connecting to Listen Up or DIY adaptor module (1/4”, banana, etc.)
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Two headphone outputs and stereo inputs for use as a compact headphones module
Electrical and Mechanical Specifications
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6HP Eurorack format module
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0.95” (24mm) maximum depth (includes power cable)
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10-pin Eurorack power header
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Power consumption
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Maximum values: All output jacks shorted to ground, 22Vpp signal on all input jacks, knobs at 100%
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+12V: 62mA
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-12V: 55mA
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Line to Mod section (top)
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Output: 1k impedance
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Input: 100k impedance
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Frequency Response: +/-0.1dB max deviation, 20Hz – 20kHz
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Maximum output level: 22V peak-to-peak
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Maximum gain: +30dB
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Mod to Line section (bottom)
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Output: 68 impedance
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Input: 100k impedance
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Frequency Response: +/-0.1dB max deviation, 20Hz – 20kHz
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Maximum output level: 22V peak-to-peak
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Maximum gain: 0dB (unity)
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Channel cross-talk:
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Test conditions: Test signal input into left Mod In jack. Sine wave at frequencies from 20Hz to 20kHz tested. Result given as a ratio of the appearance of test frequency measured on right Line Out jack to left Line Out jack. Test repeated with left and right jacks swapped. Worst-case results for any channel and frequency reported.
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20Hz – 20kHz: <-110dB
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