Introduced in 2007, the AD100VT XL was the "big daddy" of the AD Valvetronix XL Series of amplifiers. It featured two 12" Vox special design speakers in an open back, pressed board cabinet powered by a 100 watt, 12AX7 tube/solid state hybrid Valvetronix amplifier circuit. The control panel was loaded with controls for eleven amp models, eleven pedal effects and a two channel digital programmer.
The Valvetronix XL series was derived from the Valvetronix AD series that had been introduced in 2004. The preamp of the XL series amps was reconfigured to feature more aggressive, high gain heavy metal guitar voicings.