A great little problem solver. Connect MacroMix between up to 4-line level sources and output to a stereo RCA output. 4 level controls. Inputs 1 & 2 are stereo RCA, input 3 is either 1-1/4” input or dual RCA inputs, and input 4 is a 1/4” input. 1/4” headphone/line output provided, and up to 32dB of input gain is possible. 12VDC.