E.D.G.E. Acoustics is a division of Etymotic Research, the originator of high-fidelity noise-isolating in-the-ear earphones. E.D.G.E. Acoustics (Enhanced Definition Gaming Earphones) GX400 and GX100 represents the pinnacle of gaming earphone technology made possible by applying Etymotic’s best technology and proven capabilities in sound isolation and audio accuracy. From the moment you equip them, the E.D.G.E. headsets will enable you to hear what you’ve been missing – all the subtle details that will help you take your games to the edge.