Radial Engineering 4334434600 ProMS2 Passive Microphone Splitter

The Radial Engineering ProMS2 is a passive microphone splitter designed for professional audio environments where signal integrity is non-negotiable. At its core is the Eclipse ET-MS10 transformer, which provides a fully isolated output with 115dB of common-mode noise rejection — effectively eliminating ground loop hum and interference when feeding a microphone signal to separate mixing consoles or recording systems. The two additional direct through outputs pass the signal without transformer coloration, giving engineers flexibility in how they route audio across front-of-house, monitor, and broadcast systems.

Practical features round out the design: a switchable -30dB pad on the input handles hot signals from high-output condensers or close-miked sources, while the switchable ground lift on the isolated output addresses the ground loop issues that commonly plague multi-console setups. The MuMETAL-shielded steel enclosure protects against electromagnetic interference from power cables and stage lighting. Because the ProMS2 is entirely passive, there are no batteries to replace or phantom power requirements to worry about — it simply works when you connect XLR cables. This reliability and simplicity make it a staple in touring rigs, houses of worship, and broadcast studios where clean, consistent microphone splits are essential.