The market size for digital audio interfaces and computer based digital editing has increased in a massive way. With systems available at very low prices, more and more users are utilizing this technology. One of the main problems with many of these systems is the input stage only consisting of unbalanced line inputs or very low (or no mic pre) gain structure for the balanced input stage and the unavailability of Phantom power. The SM Pro Audio Q-PRE 4 Channel Microphone Preamp comes to the rescue with 4 channels of Balanced input, with a full range of gain controll from -20dB to +40dB and Phantom power switchable for ch 1 % 2 (in pairs).