Amplifiers: Type - Public Address Amplifiers; Power Rating - 600 Watts; Frequency Response - 20 Hz to 20 kHz; Signal-to-Noise Ratio - 104 dB; Input - Screw Terminals; Output - Screw Terminals; Overload Protection - Thermal and electronic overload protection; Dimensions - 17 in. W x 3-1/2 in. H x 18-1/4 in. D