TC Electronic Classic Sustain & Parametric EQ Guitar Pedal Classic Series Sustain + Parametric EQ Equalizer Pedal "The Classic Sustainer + Parametric EQ gives you studio quality compression in a guitar pedal Crank it to the extreme and it'll give your sound that percussive ""thud"" brilliant for funk or country And with its parametric EQ you're in full control of which frequencies to target One of the true grails of vintage effects pedals