RDL ST-MX3 3-Channel Audio Mixer, Line Input and Output

Optimize audio clarity and system flexibility with the Radio Design Labs ST-MX3 3-channel audio mixer. Designed for professional AV and security applications, this line-level mixer lets you combine and balance up to three independent sources with individual input gain control—ideal for surveillance, monitoring, paging and background-audio systems. The ST-MX3 delivers ultra-low noise and ultra-low distortion performance across a 10 Hz–20 kHz frequency range, preserving speech intelligibility and audio fidelity where it matters most.

Engineered for installers, the module's balanced/unbalanced line output can drive high- or low-impedance loads, simplifying integration into CCTV audio chains, public-address systems, or networked audio installations. The compact STICK-ON form factor and 24V DC SupplyFlex power input enable quick retrofit into racks, enclosures, or distributed security cabinets. With Radio Design Labs reliability and a 3-year limited warranty, the ST-MX3 is a practical choice for long-term commercial deployments. Add clean, dependable mixing to your security or monitoring system—specify the ST-MX3 for your next project.

• Blend three independent line-level sources with individual gain controls for precise audio balance
• Low-noise, low-distortion design preserves intelligibility in security, surveillance, paging and monitoring systems
• Balanced or unbalanced line output that drives high- or low-impedance loads for flexible integration
• Compact Stick-On form factor and 24V DC SupplyFlex power make retrofit and space-constrained installs simple
• Reliable, US-made hardware with a 3-year limited warranty for long-term, professional deployments