Why mix a magnetic pickup with a microphone? Because, the magnetic pickup senses the guitar string's vibrations and the microphone accurately reproduces the complex and rich character of the acoustic tone. Blended together, the result is the most natural-sounding, three dimensional, acoustic guitar soundhole pickup. Introducing the Mag Mic. The first active, humbucking, magnetic soundhole pickup featuring a built-in microphone and blend circuit, together with adjustable pole pieces. Installation is a snap. And the sound is amazing! From deep, rich lows, to percussive mids, to shimmering highs, the entire tonal spectrum of the acoustic guitar is accurately duplicated and amplified.