Blue Tube - Real Tube Enhancer

OVERDRIVE

The BK Butler Blue Tube is a tube-driven preamp and enhancer pedal for guitar, bass, or keyboards. It uses a real 12AX7 or 12AU7 tube to deliver smooth overdrive and harmonic warmth. Controls include Output, Drive, and a three-band EQ with High, Mid, and Low. The pedal is designed for low to medium gain and adds organic tube character. Its steel chassis and AC operation ensure durability and consistent performance. Each unit provides authentic tube response in a compact pedal format.