Check the listing for details. Keeley Super Phat Mod Full Range Transparent Overdrive Pedal. Condition: New. Listed at 126.65 USD. Smooth Breakup and Full-range Response Keeley has made their acclaimed overdrive circuit even better — meet the Super Phat Mod pedal. Just like the original, it breaks up sweetly like a tube amp. And with an updated JFET gain circuit, the Super Phat Mod is more dynamic and responsive than ever. Your core tone remains intact, while you determine the breakup amount with your volume control and pick attack. Flat and Phat modes offer two distinct low-end response options. Looking for an overdrive with tube-like response that won't color your tone? You want the Keeley Super Phat Mod full range overdrive.Choose from two voicings - Flat or Phat The Flat/Phat switch on the Keeley Super Phat Mod pedal offers two different low-frequency response curves.