Used BOSS GP-20 Amp Factory Effect Pedal

The BOSS GP-20 Amp Factory is a powerful amp modeling effect pedal in excellent condition, featuring 22 COSM amp models, dual amp mode, and stereo outputs. Designed for both live performance and recording, it delivers authentic amp tones in a compact, durable metal chassis. Users can easily switch between amp types with intuitive controls, making it perfect for guitarists seeking flexibility and quality sound without bulky gear. Powered by AC adapter or 9V battery.