With a volume control, it is possible to control one or more speakers from a single location. Mono 70V volume controls come in single gang size for one outlet and two sockets. Rated at 25W, 50W and 100W of power, these volume controls provide great frequency response, low insertion loss and performance you can count on in 25 and 70-volt systems. OSD's unique high power 70V volume control with thru put easy daisy chain installation, there's no need for external splicing. The silver-plated contacts mean the volume control operates without noise. A removable terminal block is included, and the white and ivory face plates are UL listed. Attenuation is accomplished in ten make before break steps plus positive off position (no stop between the maximum and off position to prevent switch damage).