Current: Grado PS500, Sennheiser HD600, Grado 225i, ATH-M50s, Denon AH-D1100 Past: Ultrasone Edition 9, Denon AH-D7000, D5000, D2000, Audio Technica W5000, Grado RS-1, HD650-Zu Mobius, ATH-ESW9, /Amps: Singlepower MPX3-SE W/Plitron, Rudistor RPX-33 MKII, Headfive, Xin Supermacro 3 Sources: Apogee Mini Dac Firewire, MacBook Pro, Stello DA100, Apogee Duet.