- Bogen metal box speakers- Rugged all-steel surface-mounted enclosure- Full range 8" cone speaker for excellent intelligibility- Compatible with 25V or 70V amplifier systems- Multiple taps at 4, 2, 1, 1/2, 1/4, 1/8 watts 4-watt maximum output power- Mounting hardware included (toggle bolts, wood screws and wire crimps)- Knockouts for Wiremold - Recessed volume control at the center of front speaker grilleBGMB8TSLVR