The Mag Mic Acoustic Guitar System from Seymour Duncan combines a hum-canceling, magnetic Stack pickup with an omnidirectional condenser mic in an all-in-one unit. It is designed for use in the soundhole of steel-string acoustic guitars and delivers natural, full-bodied warmth for live performance, recording, and more.
The Mag Mic fits guitars with soundholes from 3.75 to 4.2" and allows you to tailor your sound and blend the mic in (or out) to achieve the right overall sonic balance. There are two onboard controls for Master Volume, which controls the level of the output signal, and a Mic Volume to control how much of the mic will be mixed in.
In addition, the pickup can be installed permanently or for temporary use. Its output cable has a built-in a 1/4" female endpin jack with strain-relief loop that can can hang from your existing strap button. The active pickup uses a 9V battery (for over 450 hours of continuous use) or power can be supplied by an "N"-size battery using the included 12V battery clips which attach to the bottom of the pickup for easier portability (overall battery life is reduced to 50 hours with the "N" battery).
Finally, connect the Mag Mic your favorite amp, PA, direct box, or console with a standard guitar cable and capture the natural warmth and full-spectrum detail of your acoustic guitar.