I did a christmas show on a local cable channel some time ago and the engineer stuck a Sony ECM 44 clip mic on my shirt to cover my acoustic guitar and mandolin. I was skeptical and wanted to use my built-in mic system and he said trust me and so I did. What I heard on the play back afterwards was a very natural acoustic sound. I got one and taped it to the top of my guitar with safe release tape and a piece of foam between the guitar top and the mic. It worked great at a small cafe that we had a weekly gig at playing soft background music but didn't work out so well at venues where more volume was required but in those instances I used a Marshall acoustic amp as a monitor and for eq and I couldn't control the feedback.