Audio-Technica ATH-M50RD Limited-Edition Red Professional Studio Monitor Headphones with Coiled Cable with FiiO E6 Headphone Amplifier Audio-Technica ATH-M50RD Limited-Edition Red Professional Studio Monitor Headphones with Coiled Cable + BONUS FiiO E6 Headphone Amplifier . Exceptional audio quality for professional monitoring and mixing Closed-back cushioned ear cup design creates an outstanding seal for maximum isolation. Adjustable padded headband for comfort during long mixing/recording sessions Collapsible design ideal for easy portability and convenient storage. Proprietary 45 mm large-aperture drivers with neodymium magnet systems BONUS ($25 Value) FiiO E6 Headphone Amplifier &lt;&gt; For high impedance or low sensitivity Hi-fi headphones ButterflyPhoto is a Authorized Audio-Technica Dealer