SH-306A Frequency Response: 10-100 kHz Output Power: 455mW @ 16 ohm SNR: 105dB Distortion: Less than 0.005% Recommended Headphone Impedance: 16~300 ohm Input Impedance: 28 kOhm Output Current: 600mA max Battery Life: Around 12 hours Power Supply: 110~220V AC IN / 21V 500mA DC OUT Size...