Free Express Shipping! iFi Studio ZEN CAN Studio High-Performance Headphone Amplifier 4.4mm and 1/4" Headphone Outputs, Combo XLR-1/4", 4.4mm, and 3.5mm Inputs, 15.1V / 385mW at 300 Ohms, 7.2V / 1600mW at 32 Ohms, Gain Range: 0, +6, +12, +18 dB, 10 Hz...