The MMDI-MINI has a 3.5mm stereo jack for typical laptop sources and comes with a pigtail adapter for stereo RCA sources. The output is a mono summed mic level signal. The MMDI-PRO has a female XLR input for professional balanced +4dBu sources. Both models have a ground lift switch on the front and a terminal block on the rear for connection to a mic input on the house A/V system.
?These units fit in standard single gang wallboxes and use Decora-style cover plates.
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