The Heritage Audio DMA-73 is a dual channel mic / line preamp based on the classic Neve 1073 input and output stages, minus the equalizer of the original console module. The HPF is retained, and a 1/4" direct input was added. This JFET DI is before the input transformer, so an instrument plugged into the front of the unit will pass through this transformer and for coloration. The DMA-73 is run off of a supplied external +24V PSU.