LEN-20

Voice Alarm

LEN-20

Item number: 1801-XXXXX

The LEN-20 is a passive 100 volt speaker certified according to EN 54-24 Type B for use in voice alarm systems. Like all products in the Voice Alarm series, it is equipped with a weatherproof, steel-reinforced aluminum housing, making it equally suitable for indoor and outdoor use. The LEN loudspeakers guarantee excellent speech intelligibility and high ranges even in difficult acoustics environments.

Main features

2 × coated 4" chassis
Uniform directivity
Suppression of unwanted side lobes thanks to Fohhn Source Division Waveguide
Weatherproof without additional protection (degree of protection IP54 according to IEC 529 / EN 60529)
8 × M6 thread for safe installation
Available in different colors (RAL Classic, Pantone, NCS) or with Fohhn Texture Design
In order to ensure performance and operational safety, Fohhn system amplifiers including the correct speaker preset are required.

Colours

Fohhn technologies

Downloads LEN-20

All in one package

ZIP archive

3D sketchup files

Technical data

Electroacoustic features

acoustic design

weatherproof passive line source speaker system, closed, suppression of side lobes by Source Division Waveguides

components

2 × 4" drivers with treated cones

sensitivity 1 W @ 4 m in accordance with EN 54-24

79 dB SPL

SPLmax 100 V @ 4 m in accordance with EN 54-24 (trafo S/M/L)

92 dB SPL

transformer options, power handling in acc. with EN 54-24 100 V (trafo S/M/L)

50 W / - / -

transformer options, power handling in acc. with EN 54-24 70 V (trafo S/M/L)

24.5 W / - / -

impedance 100 % tap (trafo S/L/M)

200 ohm / - / -

impedance 50 % tap (trafo S/M/L)

400 ohm / - / -

impedance 25 % tap (trafo S/M/L)

800 ohm / - / -

2-way design

nominal directivity (h × v) (-6 dB, average @ 1-4 kHz)

130° × 60°

directivity (h × v) (octave band) in acc. with EN-54-24 @ 500 Hz

360° × 360°

directivity (h × v) (octave band) in acc. with EN 54-24 @ 1000 Hz

190° × 120°

directivity (h × v) (octave band) in acc. with EN 54-24 @ 2000 Hz

120° × 60°

directivity (h × v) (octave band) in acc. with EN 54-24 @ 4000 Hz

95° × 30°

Physical features

Optional features

CAAD simulation data

weight: net weight without optional equipment
sensitivity 1 W / SPLmax 100 V @ 4 m in accordance with EN 54-24: measured in the far field of the speaker, count back to 4 m distance
impedance 100 / 50 / 25 % tap: measured at a voltage producing 1 W per speaker system