Seymour Duncan Woody
Seymour Duncan's Woody series of pickups are designed to slot inside the soundhole of an acoustic guitar enabling you to plug your acoustic into an amplifier. There is no bodywork required in installing the pickup and it can be removed or installed at will. The tone is warm and rich with no 60-cycle hum, great for strumming and delicate fingerstyle playing.
Excellent if you have an old acoustic that you can't plug in, but don't want to damage or modify a prized guitar - or have to buy a brand new electro-acoustic! Simply slot inside the soundhole and you're away.
Seymour Duncan offers three choices in the Woody Series, but all have the commonality of instant mounting and unmounting, along with a great-looking Walnut cover that will look unobtrusively fantastic on your guitar. More importantly, if you already love the sound of your acoustic, the Woody Series will passively amplify your sound without anything to detract from it.
Especially great for singer-songwriters and folk strummers, the Woody Series offer a moderate response that gives you plenty of amplification while allowing your guitar to blend nicely with vocals and other instruments.
All Woody Series pickups will fit almost any acoustic guitar's soundhole, with a radius range from 3.85? to 4.10? They're also priced to fit the budgets of most musicians, and are a much more affordable alternative to buying a mic for acoustic amplification.

Quick-mount, passive, magnetic soundhole pickup
Hum canceling
Moderate output
Instant mount
Housed in a Walnut cover and double potted
Warm and rich tone with no 60-cycle hum
Great for strumming and delicate fingerstyle playing
Includes studio-quality 14' cable.
Works with any guitar amplifier (acoustic guitar amp preferred), or plugg