K&K Quantum Blender, 2-channel preamp / mixer, For the combination of a piezo pickup with a microphone, with a magnetic pickup or with another piezoceramic pickup, Channel 1 can optionally be switched for the impedance of a microphone or a pickup, Channel 2 was designed with the K & K Pure pickup in mind, but works with most other piezo pickups, Both channels are completely independent and both offer a 3-band EQ (treble, midrange, bass), a phase inversion switch, and gain and volume controls, Inputs: Stereo 1/4 ""jack input, 2 mono 1/4"" jack inputs, Outputs: Balanced XLR mix out (combining both channels), unbalanced line level 1/4 ""mix out (combining both channels), individual 1/4"" line outputs for channel 1 and 2, An effect loop lets you loop in an effect using a special stereo cable with a 1/4 ""stereo jack on one side and two 1/4"" mono jack plugs on the other, Includes power supply unit