The ATH-E40 from Audio-Technica are professional in-ear monitor headphones that feature a proprietary, dual-phase push-pull driver design that provides improved fidelity and efficiency. These headphones deliver powerful bass along with balanced mid and high-frequencies to convey the full emotion of the music, whether you're playing live on stage or just listening to music on the subway. The ATH-E40 features a specially engineered housing that is designed for improved isolation from outside sound. Isolation and comfort are enhanced by the four sizes of included silicone eartips for custom fit.