BOSS EQ-200 Graphic Equalizer Pedal for Electric Guitar, EQ-200
Amazon.com: 10 Band EQ Pedal, Equalizer (31.25Hz-16kHz) for Electric Guitar Bass Including 4-string 5-string 6-string 7-string Guitars : Musical Instruments
Artec SE-BEQ Bass Graphic Equalizer Pedal with Chromatic Tuner