Gowe&reg; Vacuum Tube Integrated Amplifier Output Power: 10W x 2 Class AB1 P-P(Ultralear), 15W x 2 Max. Output Impedance: 4-8 Ohm Damping Factor: &gt; 3 Frequency Response: 20Hz - 30KHz / -1dB T.H.D.: &lt; 1% 20Hz - 20kHz (Ref. Output) Total Gain: 30dB Input Sensitivity: 300mV - 600mV S/N Ratio: 89dB (Hum Noise &lt; 3mV) Channel Balance: /- &lt; 1dB 20Hz - 20KHz (Max. Volume) Channel Separation: &gt; 60 dB (1KHz - 3.3KHz) Tubes: 6V6 x 4, 12AX7 x 1, 12AU7 x 2 Dimension: 275D x 266W x 160H mm Weight: 10kg Power supply: 220V-240V 60/50Hz Please see more specifications on the pictures, Don't buy others' fakes. Only buy from Gowe Industrial can enjoy after-care service.