The JOYO BanTamP Zombie micro guitar amp head blends valve and solid state guitar amplifier technology, resulting in a tiny 20-watt amp head that can produce an immense high wall of sound. This is the type of sound that you know from huge 150-watt tube heads but would never expect from a small and portable amplifier. Your chords will chug and punch, and your solos will cut through the mix. The Zombie amp also works great at lesser gain settings and lets you use your favorite overdrives to push it into higher gain with their own unique tones. Once you start working with this amp, you'll soon feel as if you're playing through a much bigger head. The amp operates with a single 12AX7 tube in the preamp and uses a solid state power amp.