Graphic Equaliser · Effect Type: Equalizer · Technology: Analog · Mono / Stereo: Mono In, Mono Out · Controls: 100 Hz, 200 Hz, 400 Hz, 800 Hz, 1.6 kHz and 3.2 kHz · Bypass Mode: True bypass · +/- 18 dB Cut or Boost · MXR has reworked its 6 band equalizer. The M109S offers, as before 6 frequency bands which can be increased or lowered by 158 dB respectively. The secondary noise has been significantly improved.