More tones than should be legal in a three knob amp! From lush cleans to classic grind, and all flavors in between, you are sure to find tones that never cease to inspire. All with plenty of low end push! The Thunderbolt 30 features two differently voiced inputs, both are extremely touch sensitive. Input 1 goes from clean to aggressive british overdrive with some vintage flavor. Input 2 is smoother, sweeter and rounder, with plenty of chime! The knob layout of the amplifer features Volume, Tone, and Master Volume. Unlike many master volume designs, the Greer master volume design is transparent, and pleasantly functional. Allowing the player to ahieve overdriven, and semi-overdriven tones are reasonable volumes. Players can use 6L6 or KT77 tubes without rebiasing. Power Output: 30 Watts Output Tubes: 2 x EL34 (Cathode Biased) Preamp Tubes: 2 x 12AX7 Rectifier: 1 x 5AR4 Controls: Volume, Tone, Master Thunderbolt 30, Clip 1 (Tele) Thunderbolt 30 is used for all guitar tracks. Thunderbolt 30, Clip 2 (Strat) Thunderbolt 30 is set for clean tone. Thunderbolt 30, Clip 3 (Les Paul) Amp settings: Volume 6, Tone 6.5, Master 7, Input 1 Thunderbolt 30, Clip 4 (Tele) Amp settings: Volume 6, Tone 5, Master 6, Input 1