L-VJM20A/EN 20W Unidirectional Sound Projector 100V

The 582474 is a Voice Alarm Speakers unidirectional sound projector engineered for accurate, intelligible broadcast of evacuation messages. It delivers a broad 150 Hz to 20 kHz frequency response with low distortion and 89 dB SPL at 1 W / 1 m, supporting clear projection in voice-alarm applications. The device operates at 100 V / 70 V with multiple power taps (20 W / 10 W / 5 W / 12.5 W) and a maximum rating of 30 W, directing sound precisely where coverage is required.

Constructed for fire-resistant installation, it uses fire-resistant cable for connection and features a 5.25-inch speaker diameter within dimensions of ⌀ 140 mm x 140 mm x 195 mm, weighing 2.65 kg. Sound pressure level remains consistent at 89 dB whether measured at 1 W / 1 m or 20 W / 4 m across the 100 Hz to 10 kHz range, supporting reliable performance under varying load conditions. Rated impedance varies with tap selection: 500 Ω / 11 kΩ / 2 kΩ / 4 kΩ corresponding to the power taps.

Designed for use with a 100 V / 70 V line transformer, the 582474 follows specific wiring colour coding: for 100 V line, Red=20 W, Green=10 W, Blue=5 W, White=2.5 W, Black=Com; for 70 V line, Red=10 W, Green=5 W, Blue=2.5 W, White=1.25 W, Black=Com. Physical connection details are documented in the installation manual, and it supersedes part number 582441�. Additional order information is available in the VAPA System VARIODYN D1 product catalog.