Empress ParaEq Parametric Eq Pedal w/ Power Supply Bundle Includes a Power Supply! Ultra Transparent Sweet Sounding EQ  enhance your sound without masking the tone of your instrument. Lots of Control - with switchable q, fully over-lapping sweepable frequency selection, and 15dB of cut and boost youll get all the control you need. Ultra-Quiet  Youve come to expect our pedals to be noise free and weve delivered once again. If you put this at the front of your chain and boost a bit youll also cut down on the noise your other pedals are introducing. Loads of Headroom - Internally switchable to run off 9/12/18V power supplies.