S86 speaker (with t725 transformer and knob volume control)

Bogens Ceiling Speaker Assemblies consist of an 8 in. Cone Speaker S86 or S810 pre-assembled onto a 13 in. steel ceiling grille painted with off-white PG8W or bright white PG8U enamel. Options for these assemblies are recessed volume control VR volume control with knob VK and rear-mounted screw terminal strip for power taps BR.Features. 4-watt capacity. 8 in. cone speaker for excellent audio quality. T725 4-watt transformer. Off-white enamel over steel grille W versions. Pre-assembled for faster installation. Works with both 70V and 25V amplifier outputs. volume control - with knob. 10 oz. magnet weights