4-inch full-range flush-mount ceiling speaker for indoor 100 V public address systems. The passive speaker provides 6 W RMS rated power, with a selectable 3 W or 6 W power tap. It features a frequency range of 100–20,000 Hz, 89 dB sensitivity, and a maximum SPL of 100 dB. The gold speaker has a 13.5 cm diameter, 8 cm depth, and is designed for speech and background music in installations such as restaurants, hotels, gyms, and sports centres.