Enya "AcousticPlus" allows players to add sound effects from the instrument itself, with no external devices needed. Each Enya AcousticPlus instrument has a built-in actuator. This groundbreaking technology takes the string vibrations and enhances them to allow players to add sound effects from the instrument itself, with no external devices needed, providing a simple but effective way to process the natural sound. The AcousticPlus system also works as the acoustic-electric pickup enabling plugging into an amp.