Mountable mono PA volume controller for 100 V line systems with a rated power handling of 10 W RMS. It provides attenuation in 11 steps and includes a 24 V emergency priority relay. The unit has a white plastic front panel and knob, screw plug connections, and is designed for flush mounting. An optional finery housing is available. The frequency range is 50–18,000 Hz, and the controller weighs 0.20 kg.