The maple SA-3HC Woody Hum Cancelling Steel String Acoustic Guitar Pickup from Seymour Duncan is an instant-mounting, passive, noiseless, magnetic soundhole pickup that delivers a warm, rich acoustic tone.
Its hum-cancelling design delivers a fatter, more compressed sound that the single-coil version, making it ideal for all types of acoustic playing.
The pickup mounts instantly into a standard 3.75 to 4.0" soundhole with no modification of any kind needed to the guitar and it can be easily removed at a moment's notice. It is also double potted to resist feedback. It comes with a 14' cable that will plug into your favorite amp, PA, direct box, or console.
This is a magnetic pickup and will not work with nylon stringed instruments.