EarthQuaker Devices The Warden Optical Compressor Guitar Effects Pedal Complete tone enhancement tool designed around a stereo preamp to cover as much frequency range as possible Handles a wide variety of frequencies from electrical guitars, bass guitar, synthesizer machines and just about anything else you can plug in The treble, bass and middle controls will cut or boost up to 20db The level control will boost the signal (post EQ) up to 5 times the input depending on where the dial is set A simple, perfect pedal to place at the end of your effect chain to boost output and fine tune your tone Place at the front of the chain to alter the character of your guitar and breathe new life into tired old dirt Made with care by human hands in Akron, Ohio