B-Stock, K&K Quantum Blender, two-channel preamp/mixer that provides all the control and features you could ever want to combine a piezo transducer with a microphone, magnetic pickup, or another piezo pickup. Channel 1 is switchable between microphone and pickup impedance. Channel 2 is designed with K&K's Pure pickup in mind, but it works well with most piezo transducers. The two channels are fully independent and each feature a powerful 3-band EQ (treble, mid, bass), phase switch, and gain and volume controls. Inputs: Stereo 1/4" line input, 2 individual mono 1/4" line inputs. Outputs: Balanced XLR Mix Out (carries both channels), Line level 1/4" Mix out (carries both channels), Individual 1/4" line outputs of channel 1 and 2. Effect Loop: The effect loop allows for connecting to an effect unit (like reverb) via a special 1/4" stereo cable with a stereo plug on one side and two mono 1/4" plugs on the other side. Incl. power supply, B-Stock with full warranty, may have slight traces of use