RDL RU-MX4 Professional 4-Channel Microphone/Line Mixer with Phantom Power, Microphone and Line Output

For integrators who need reliable, compact audio control for security, surveillance and AV monitoring, the Radio Design Labs RU-MX4 professional 4-channel microphone/line mixer delivers flexible, field-ready performance. This pro audio mixer accepts either balanced XLR microphones or unbalanced phono line inputs on each of its four channels, with individually switchable 24 V phantom power to support condenser mics only where required. A switchable balanced output (mic or line) and optional RU-MX4T output isolation transformer help prevent ground loops and simplify connections to CCTV recorders, intercoms, or audio-over-IP gateways.

Operators benefit from front-panel dual-LED VU meters on every input and a smooth LED string master meter for accurate level monitoring, plus a selectable soft-knee compressor to maintain intelligibility in dynamic environments. The unit’s compact 1U design can be expanded—three RU-MX4 units fit in a single RU-RA3HD rack adapter—making it ideal for control rooms, remote monitoring sites, and integrated low-voltage installations. Add the RU-MX4 to your security or AV system for dependable mixing and clear monitoring — contact sales or order now.

• Mix mic and line sources seamlessly: accept balanced XLR mics or unbalanced phono line inputs on any channel for flexible integration with CCTV, conferencing, and monitoring systems.
• Per-channel 24 V phantom switching: power condenser microphones only where needed to reduce noise and simplify on-site setup for security and AV installations.
• Compact, rack-ready expansion: 1U footprint with the ability to mount up to three units in a single RU-RA3HD rack adapter for space-conscious control rooms.
• Consistent, broadcast-style levels: front-panel dual-LED VU meters per channel, an LED string master meter and an optional soft-knee compressor ensure steady, intelligible audio for surveillance and public address.
• Balanced output and optional isolation transformer: switchable mic/line balanced output and RU-MX4T isolation option minimize grounding issues and improve interoperability with low-voltage and IT audio equipment.