Behringer AC108 Vintager Amplifier Extremely versatile guitar amplifier with hand-selected 12AX7 vacuum tube Authentic vintage design with Ultratube circuitry for classic tube sound Powerful 20-Watt, 8" vintage-tuned guitar speaker 2-channel tube preamp and wide-range gain control for super-fat sounds with all pickup types Dedicated 2-band EQ plus mid-shift button for creative sound-shaping