The BOSS AD-2 Acoustic Preamp gives you a natural acoustic sound and is the ideal addition to carry everywhere you take your acoustic-electric guitar. BOSS AD-2 Acoustic Preamp is the ideal pedal for acoustic-electric guitarists who desire natural studio quality while gigging. The BOSS AD-2 Acoustic Preamp uses the advanced BOSS sound engine with great functionality inside small size and easy to use interface. Acoustic Resonance reproduces the complex resonance characteristics of your unplugged tone, while Ambience provides pro-level reverberation perfectly optimized for acoustic guitar. The AD-2 also features essential stage tools such as a notch filter for feedback control, a balanced DI out for direct connection to a PA, and a convenient mute function for tuning and switching guitars.