The Micro Line Mixer is a 4 input stereo mixer that’s small enough to fit on a pedalboard. It’s ideal for creating parallel or wet/dry/wet guitar rigs, or for any place audio signals need to be combined. The Micro Line Mixer is a simple product with many applications. It combines up to 4 incoming mono or stereo audio signals into one, which makes it useful for many purposes, for example: Creating a parallel effect system Creating a Wet/Dry/Wet effect system Mixing multiple audio sources such as synthesizers, preamp outputs, etc. Features include: A "dry" input that can be configured for mono or stereo input, mono or stereo output 3 "wet" inputs that are stereo (but compatible with mono signals) 1 output that's a buffered version of the dry input signal 1 output that contains all 4 inputs, mixed down together 1 level control for the dry input 1 level control that controls all of the wet inputs together The Micro Line Mixer requires a 9-24VDC center negative (Boss-type) power supply, with 50mA or more of current capacity