Zenith 1300 is a 2-channel 500 W @ 4 Ohm professional audio amplifier, with switching power supply, built in a 2 rack unit metal enclosure. It has balanced inputs in XLR3 format and 1/4" TRS jack and outputs with XLN4 connectors. It has selectors for input sensitivity, operating mode and bass boost. It also has protection systems against short circuit, temperature, DC, VHF and constant high frequency signal The front panel has a power switch, independent volume controls for each channel and indicators for power, signal, clip, protection and operating mode.