Power Amplifier with DC Input designed for commercial and industrial public address applications. They are Support AC power and DC 24V power input. Balanced line output feeds to another power amplifier as well as secures the signal transmission are less noise and longer distance. 70V, 100V and 4 Ohm speaker outputs are convenient for installation when selection different speaker matching. A master volume control is included. Complete protection includes clip, short circuit, high temp and overload. Indications for power, signal, clip, protection and temp.