YAQIN MS-110B KT88 x4 Vacuum Tube Integrated Amplifier Output Power: 54W x 2 (6ohms) Valve Tube: KT88 x 4 12AU7 x 2 12AT7 x 2 Frequency: 10Hz-65kHz(-2dB) Signal to Noise Ratio: 85dB (A weighted) Input Sensitivity: 0.3V (1kHz)