Excerpt: This review is about an experiment. Can consumer-level in-ear headphones be used as live in-ear monitors? We thought so, so we acquired a dozen of them from audio-technica and set them to work at a local church. You see, the worship band was converting from on-stage monitoring to in-ear monitors. Here's what happens—you throw a bunch of guitarists, four singers, a bassist, a keyboardist, a pianist, and a drummer on stage.