A guitar compressor is a sound processing device that is used to reduce the dynamic signal range. In other words, the compressor reduces the difference between the most loud and quietest sounds, making the sound more even and controlled.
4 Controls :
Volume - Output Level
Attack - Speed / Intensity of Attack
Ratio - Degree of compression sustain
Blend - mixes the clean input signal and compressed signal.
Passive true bypass.
Need external 9 VDC /120 mA
power supply (not included).