The ETS SMA4-LP-C5 is a 4-channel microphone and speaker driver interface designed for use with ETS surveillance audio systems. It supports four line-level microphone inputs and provides a 2-watt (70V balanced line) speaker amplifier output. The device connects via a CAT5 main cable and is compatible with ETS C5 option microphones and speakers.
Each channel includes adjustable volume controls and balanced 600 Ohm signal transmission with built-in transformer conversion to unbalanced signals. The interface features terminal connections for call switches and door lock relays, and it supports cable runs up to 1,000 feet between devices. Additional protections include short circuit protection, auto-reset fused circuits, and LED status indicators.
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