LR Baggs Lyric featherweight microphone, each high-graded for ideal response, mounts to the underside of the bridge plate with simple peel-&-stick adhesive to preserve the integrity of your instrument. The mic leverages the "pressure-zone" principle by positioning the capsule just 3mm from the surface of the top to hear the entire soundboard for even balance and tone. And the mic's proximity to the top allows high gain before feedback. Unlike other attempts to use an internal mic, the LR Baggs Lyric employs noise canceling technology that rejects "boxy" reflections inside of the acoustic chamber. This patent pending minor miracle enables the mic to act as if it were outside of the guitar delivering a clear and open performance.