Built-in speaker Legrand 346991 2-wire for 8 call buttons

Built-in speaker Legrand 346991 is a compact 2-wire audio unit designed for integration into door entry, nurse call and intercom systems that support up to eight call buttons. The flush-mount design is intended to fit standard housings and allows simple installation in residential and commercial environments. The unit provides clear audio output for voice communication and alert tones, and its two-wire connection reduces wiring complexity when expanding or retrofitting existing installations.

Advantages

The Legrand 2-wire built-in speaker offers a space-saving, flush-mounted form factor that blends with standard door-entry housings. Its two-wire connection simplifies installation and reduces the amount of cabling required compared with multi-conductor devices. The speaker delivers intelligible voice output and defined alert sounds suitable for communication in corridors, lobbies and patient rooms. Designed to be compatible with systems using up to eight call buttons, the unit supports scalable setups and straightforward replacement or expansion.

Suitable for

• Door entry and intercom installations in apartments and small offices
• Nurse call systems in clinics, care homes and assisted living facilities
• Retrofit projects where minimal wiring changes are desired
• Areas requiring discrete, flush-mounted audio output for communication and alerts

Key specifications

• Connection: two-wire audio connection for simplified wiring
• Compatibility: supports systems with up to eight call buttons
• Mounting: flush-mount design for standard housings
• Acoustic output: designed for clear voice and tone reproduction suitable for short-distance communication
• Application: intended for residential and commercial door entry, intercom and nurse call installations

How to use

Install the built-in speaker into a compatible standard housing following the system manufacturer’s installation guidelines. Connect the two wires to the corresponding audio terminals of the intercom or nurse call control panel, observing polarity if required. After mounting and wiring, test audio output and call-button operation to confirm clear voice transmission and correct alert tones. Adjust the system amplifier or volume controls as needed through the main control unit to match the acoustic level of the installation environment.

Usage recommendations

Position the unit where sound is not obstructed by doors or dense furnishings, and verify compatibility with the existing control panel and call-button layout before installation. For noisy environments, adjust system volume at the control unit rather than relying solely on speaker repositioning. When expanding a system to the maximum supported number of call buttons, ensure the control panel and power supply specifications meet cumulative load requirements.