RTS SSA324 2-Channel 2-Wire to 4-Wire or 1-Channel 2-Wire Interface / Call Signal / 1RU Half-Rack

Description

The SSA324 is an intercom system interface designed to bridge 2-wire and 4-wire partyline circuits and enable reliable voice connectivity between different intercom systems. It supports operation as a 2-channel 2-wire to 4-wire interface or as a single channel 2-wire to 2-wire interface. The unit includes call signaling, channel monitoring, and channel selection functionality to support live production workflows.

Key features include selectable channel routing, integrated call signal, and monitoring capability to ensure clear communications and operator control. The design offers level controls and ducking options to manage signal transfer and prioritize talk paths. Rack compatibility is provided by a 1 RU high, half-rack wide chassis that fits standard audio racks and panels.

Performance specifications include input and output impedances optimized for partyline and 4-wire talkback environments, wide operating level ranges, and controlled frequency response tailored for intelligible speech. The SSA324 maintains a typical signal-to-noise ratio of -60 dB and crosstalk performance around -50 dB under reference conditions. Level pots provide gain adjustment across defined rotations to match system levels.

Connectivity covers 2-wire inputs and outputs as well as 4-wire inputs and outputs with single-ended or differential options. The module supports standard mains options and power consumption values for global deployment using specified voltage options. The front panel provides monitoring and selection, while rear connections conform to conventional intercom wiring practices.

Typical use cases include intercom bridging between disparate partyline and matrix systems in broadcast galleries, ENG trucks, and fixed studio installations. The SSA324 is suitable for call paging, talkback integration, and system isolation tasks where controlled signal transfer and call signaling are required. It is designed to operate in environments that require predictable audio performance and operational clarity.

Installation is straightforward using standard rack mount hardware and standard mains configurations. The unit is built with an aluminum case and thermoplastic front panel for durability in professional environments. Manual nulling and accessible adjustment pots allow field calibration and straightforward integration into existing intercom fleets.