Bogen 35-Watt Attenuator (double gang size) AT35A -35 Watt Attenuator allows the output level of a group of loudspeakers to be set from a wall mounted volume control, without affecting overall amplifier volume settings. Provides 10 levels of sound control plus an off-setting. -Features:-Adjusts loudspeaker output levels on 25V and 70V systems -Controls up to 35 watt speaker groups -10 attenuation steps and an off setting -Mounts in standard electrical box -Simple connections -Dimensions: 4-3/4in (W) x 4-3/4in (H) x 3in (D)