* LED status indicators * Short-circuit, clip and hi-temperature protection * XLR/phone jack input/output * 4-16 ohms, 70V, 100V speaker outputs AP-E Series (2U Chassis): AP-350E: 350 watts, AP-500E: 500 watts, AP-650E: 650 watts; (3U Chassis): AP-1000E: 1000 watts, AP-1500E: 1500 watts, AP-2000E: 2000 watts The AP-E Series are heavy-duty public address power amplifiers that deliver clean audio power from 350 to 2000 watts RMS with less than 0.5% distortion. Rugged and overbuilt to provide years of reliable service they are equipped with torroidal transformers, extensive heat-sinking, forced fan cooling and protective circuits against short-circuit, clipping and over-temperature. 4 ohms, 70V and 100V transformer-isolated speaker outputs are provided.