There is something special about a Keeley Modded Blues Driver. Theres something even more remarkable about Andy Timmonstone. Coincidence? We think not. Since his exposure to this Keeley modded stompbox early on, it has been virtually glued to Andys board. The Super AT Mod Overdrive captures the magic of the original Blues Driver Phat Mod with the addition of AT Mode. Chord work and harmonies are cleaner and tighter now, without reducing gain.Main features:Andy Timmons Signature Overdrive Effects Effects PedalLimited to 1000 pcs. worldwideProvides slightly broken up/clean tones and amp-like overdriveAmp-in-a-box that adds Asymmetrical tube-style clipping using JFET transistorsBased on the Keeley Blues Driver circuit Phat ModAdded Tone switch provides 2 Modeso AT - Andy Timmons mode voiced - for Humbuckers with lower mid-bass frequencies for tighter more transparent responseo Phat - for single coils - adds a slight bass boostTrue Bypass SwitchingMade in Edmond, USAP