EN 54 is a standard of the European Union for fire detection and fire alarm systems, and the relevant parts to the voice alarm and audio industry are part 16, which is concerned with voice alarm control and indicating equipment, and part 24, which refers to loudspeakers.

HQ10EN plastic horn speakers 10W at 340Hz – 16kHz range. HQ 10EN high quality horn speakers for voice evacuation and public address systems. 105 dB sensitivity makes these horn speakers suitable for noisy and large environments. Equipped with ceramic wire terminal and thermal fuse and is designed for use in a voice alarm applications for clear and intelligible speech announcements. EN54-24 certified.

Power: 10 W
Transformer power taps: 10 W - 7,5 W - 5 W - 2,5 W - 1,25 W
Sensitivity: 105 dB (1 W/1 m)
Frequency response: 340 Hz – 16 kHz
Dimensions: 172 mm × 131 mm x 227 mm
Colour: Light grey RAL7035