The Pure Maccaferri XT is an external pickup system that easily intalls on any type of Maccaferri guitar, oval-hole or d-hole. The twin head pickup consists of a compression-mounted element in the arch of the bridge and a soundboard transducer. With this combination, we're able to achieve a great tone quality and very impressive and substantial volume before feedback. • MFSKU PureMaccaferriXT