Rugged all-steel surface-mounted enclosure Full range 8in. cone speaker for excellent intelligibility Compatible with 25V or 70V amplifier systems Multiple taps at 4W 2W 1W 1/2W 1/4W & 1/8W 4-watt maximum power output. Available as flat-fronted (MB8TSQ) or with 12.5 angled front (MB8TSL).