Unlike piezo pickups, the acoustic soundboard transducer is never quacky or trebly. Works like a condenser mic for natural sound and low feedback. The AST (acoustic soundboard transducer) provides unprecedented natural acoustic sound, even at high volume levels. Bigger 14mm pickup surface acts to capture detailed acoustics of the instrument without sounding boxy. All the advantages of a microphone, without feedback and positioning hassles. Attaches to the guitar's bridge plate with a special 2-sided tape. String balance is always even. An ultrathin, flexible, and rugged constant structure all the way to the preamp. Connection to the preamp is an easy "plug in" without soldering.