Connect and safely control multiple speaker pairs with a single amplifier. Automatic impedance protection circuitry. 100 watts/channel continuous power handling capacity, 200 watts/channel peak. 4.6-ohm minimum amplifier impedance with four 4-ohm speakers selected, 5.3-ohm minimum with 8-ohm speakers. Individual zone on/off buttons and volume controls. Heavy-duty screw-type connectors supporting 12-18 AWG speaker wire.