Baldwin Boxall 6W Volume Controls with Override Relay BVC6 Baldwin Boxall 6W Volume Controls with Override Relay BVC6These volume controls are designed to attenuate the signal fed to loudspeakers driven by the 100-volt line output of a public address amplifier. The volume control is fitted into a single surface box and can be used with any number of loudspeakers provided the load does not exceed 6 Watts.The control has 9 steps of 3dB. The knob is fully rotating. A volume restoration relay is fitted. This enables the volume control to be over-ridden when required. Used when announcements and warnings must be heard at full volume irrespective of the setting of the volume level. GBP 129.73 1