So you love everything about your rig except one thing - fizzy, shrill treble frequencies. Fret not! Amptweaker is here to help with the Defizzerator. With three settings and a 'Zap' knob to fine tune ice-picky high end, Defizzerator is a passive EQ with a low impedence output. The Defizzerator can work in your signal chain (after a buffer for best results), in your amp's effects loop or the effects loop on any Amptweaker pedal that has one.