Each module has its own separate output level control and lighted 48v phantom power switch. The back panel has XLR connectors for mic input, line input and output. The oversize external power supply puts out two times the current necessary to power the rack. It has an extra DC outlet which will operate any of our 1272 preamps or Class A Mixers. The power supply may be set for 220/240 volt operation for Europe or Australia at no extra charge. As well we can set it for 100 volt operation for Japan at no extra charge.