RDL DB-TPSM2A Active Two-Pair Sender, Dual Microphone Preamplifier, Twisted Pair Format-A

Optimize microphone capture for security, surveillance and pro AV applications with the Radio Design Labs DB-TPSM2A active two-pair sender. This dual microphone preamplifier and Format-A twisted pair sender converts two balanced XLR mic sources (with P48 phantom power) into reliable, low-voltage audio over two Format-A pairs—reducing cable runs and simplifying field wiring. Switchable mic gain (40 dB / 60 dB / Automatic) accommodates condenser and dynamic mics, so installers get consistent levels without onsite tweaking. The module is remotely powered through the RJ45 connector and includes signal/power pass-through for daisy-chaining, enabling centralized power and streamlined rack or wall-box deployments. An output pair selector gives per-channel routing control, making it easy to assign feeds to different monitoring, recording, or PA zones. Built to mount in standard U.S. electrical boxes or RDL WB series wall boxes, the DB-TPSM2A ships with a choice of Decora-style front panels to fit commercial, hospitality, or industrial interiors. Ideal for CCTV audio, perimeter monitoring, conference and paging systems—add this RDL pro wall plate module to your next security or AV project to simplify installation and improve on-site audio performance.

• Delivers clean, pro-grade mic signals over inexpensive twisted-pair cabling to simplify installation and reduce wiring costs
• Dual XLR inputs with P48 phantom and switchable 40/60/Automatic gain let you support both condenser and dynamic microphones without extra gear
• Remote power via RJ45 and pass-through connectors enable tidy, rack-centered deployments and daisy-chaining for scalable systems
• Output pair selector routes each preamp to any Format-A pair for flexible zone or channel assignment in monitoring and security systems
• Decora-style front panels (black/white/stainless options) integrate seamlessly into commercial AV, surveillance, and physical security installations