The BOSS AC-3 Acoustic Simulator is a compact guitar effects pedal designed to transform the sound of an electric guitar into a rich, acoustic-style tone. Based on advanced COSM modeling technology, the AC-3 offers multiple acoustic modes—like Standard, Jumbo, Enhanced, and Piezo—to emulate various types of acoustic guitar sounds. It features reverb control, a top and body EQ adjustment for tone shaping, and separate outputs for line and amp connections, making it ideal for both live and studio setups. Whether you're looking to add acoustic flavor without switching guitars or need versatility on stage, the AC-3 is a convenient and reliable tool.