Audio Technica ATH-M30x Professional Monitor Headphones
Audio Technica ATH-M30X Studio Monitor Headphones+4-Way Distribution Amplifier - Rockville Audio
Amazon.com: Audio-Technica ATH-M30x Professional Studio Monitor Headphones for Studio Tracking and Mixing (Black) Bundle with Blucoil 4-Channel Headphone Amplifier, and 6-FT Headphone Extension Cable (3.5mm) : Musical Instruments