The Bogen S86T725PG8UVK are 8" unmounted cone-type loudspeakers with 6-ounce magnets with speaker transformers that work with both 70V and 25V amplifier outputs. The unit features a bright white enamel over steel grille, a volume control with knob and a 50 Hz to 12 kHz frequency response. Also known as -S86T725PG8UVK Ceiling Speaker-Bogen S86T725PG8UVK Speaker - 4 W RMS - 1-way