Natural Sound with Power, Definition, and Presence. https://www.boss.info/global/categories/amplifiers/acoustic_singer/ The BOSS Acoustic Singer Series provides the Acoustic Resonance feature which employs advanced processing to eliminate the hard, sterile sound produced by the piezo pickups in most stage guitars. This powerful feature not only enhances the character of your pickup, but also restores the complex natural resonances that are so often lost when amplifying your acoustic. Check out t