behringer, beq700

7-band Graphic Equalizer with 15dB of Boost/Cut, LED indicator, and Noise-free On/Off Switch
  Behringer BEQ700 Bass Graphic Equalizer Guitar Effects Pedal (BEQ-700 / BEQ 700)

Covering the audio spectrum from 50Hz to 10kHz, the Behringer Bass Graphic Equalizer BEQ700 gives you 7 frequency bands that have been carefully chosen to give you extensive tone-shaping