Bogen Model AS1 is an 8", cone-type loudspeaker, complete with a built-in 1-watt amplifier and volume control. Volume control allows adjustment of the paging level at each speaker location in the system. The speaker is available unmounted or fully assembled in a wall baffle (Model ASWB1), on a white ceiling grille(Model ASWG1), or on a white ceiling grille with a detachable knob for volume control (ASWG1DK).