XL FAT Drive

Overdrive + Boost w/ FX Loop



Pigtronix FAT Drive XL combines two of our most powerful circuits into a single, high performance, dual footswitch stompbox. This custom shop pedal boasts independent FAT Drive and Class A Boost functions that can be individually engaged or stacked together to produce everything from touch sensitive, high output drive to ultra-saturated high gain distortion, at any volume. Both the drive and boost sections in the FAT XL are based on Pigtronix unique analog designs that set the world standard for touch sensitivity, note clarity and low noise operation.

Equally effective with instrument or line level signals, the FAT Drive XL is the ultimate live performance or studio recording tool for musicians seeking all analog tube emulation and a mastering grade preamp for their instrument or even finished tracks. Additional flexibility is delivered via Send & Return jacks on the back side of the pedal that allow additional effects to be patched in between the overdrive and boost circuits on the FAT XL.

FAT Drive XL runs great on 9VDC from most standard power supplies, but ships with a Pigtronix 18V supply for maximum headroom and overall output levels.  Both of these sections are “True Bypass,” providing transparent pass through when not in use. FAT Drive XL is available exclusively from Sam Ash Music stores nationwide and online via SamAsh.com.



  • 100% Analog wide range overdrive
  • Multi-Stage Tube Emulated Clipping
  • Hi / Lo gain mode switch
  • Passive LPF Tone Control
  • Up to +20db J-FET Clean Boost
  • FX Loop for INSERT
  • True Bypass Switching
  • 18VDC 300mA supply included
  • Chassis Size = 5.7” x 4.7” x 1.5”
  • Circuit Design by Howard Davis
  • Sound Design by David Koltai

Additional Info

XL FAT Drive User Manual: Click here to download PDF