RDL RU-ASX4D Stereo Audio Selector 4x1

Streamline audio source management in control rooms, surveillance suites and Pro AV installations with the Radio Design Labs RU-ASX4D stereo audio selector. This 4x1 audio switcher delivers dependable, silent solid‑state switching so microphones, consoles and monitoring feeds switch cleanly without clicks or dropouts. Each of the four stereo inputs accepts balanced or unbalanced signals, includes rear-panel screwdriver gain trims and is metered by dual LED VU meters so you can align levels precisely. With a wide frequency response (10 Hz–20 kHz), greater than 20 dB headroom above +4 dBu and a maximum input capability of +25 dBu, the RU-ASX4D preserves dynamic range and minimizes distortion in demanding AV, security and monitoring environments. Choose locally via long-life front-panel pushbuttons or remotely using sequential or momentary remote control — plus open-collector control outputs for system integration. Powered by 24 VDC and built for professional installations, this Radio Design Labs audio selector is ideal for surveillance audio routing, broadcast monitoring and conference rooms. Add the RU-ASX4D to your rack to centralize audio switching and improve operational reliability.

• Simplify source selection across pro AV, security and surveillance systems with one-touch front-panel or remote control for reliable audio routing
• Preserve audio integrity with silent solid‑state switching, >20 dB headroom and up to +25 dBu maximum input for low distortion and high dynamic range
• Fine-tune levels on each stereo input with rear-panel gain trimmers and monitor levels with dual front/rear LED VU meters for consistent mixes
• Flexible connectivity: accept balanced or unbalanced stereo inputs and outputs with secure detachable terminal blocks for clean installations
• Remote-friendly control and system integration: supports sequential or individual remote selects, open-collector outputs and multi-location control for centralized monitoring
• Rack-friendly module design and 24 VDC operation for easy integration into surveillance, broadcast or control-room racks