THD Flexi-50 50W/20W Class AB Amplifier Head Standard

50W/20W Class AB amplifier. Hand-built. Wattage select switch (50W/20W). Single channel. Footswitchable overdrive/boost and master volume control. Accepts almost any preamp and power tubes in any combination. Ships with 3 - 12AX7s (preamp) and 2 EL34s (power amp). Lo/Hi input switch. Volume, Treble, Middle, Bass, Master, and Cut knobs. Boost section with separate Gain and Tone knobs.