The Keeley Tube Drive Twin Triode Dual Overdrive is a powerful dual-overdrive pedal that packs two distinct voices into one rugged, great-looking enclosure. On one side, a genuine high-voltage (168V) vacuum tube overdrive. On the other, Keeley's legendary Phat Mod. A simple foot gesture can switch effect order on the fly. Select between true-bypass or Keeley's renowned silent buffered switching. Dial in everything from warm, touch-sensitive tube grit to uber-thick, stacked overdrive tones. At the center of every pedal is a premium Keeley-branded 12AX7 tube, carefully burned-in, fully tested, and proudly displayed behind a custom tube shield. Built from start to finish in Keeley's Oklahoma City headquarters, this is a pedal you’ll be proud to place at the heart of your rig. Delivering real tube warmth, modern flexibility, and uncompromising Keeley quality, the Tube Drive is a pedal tone enthusiasts will absolutely love..