<br>Features: <br>The whole machine is designed with aluminum alloy casing. It adopts imported materials and is tested and inspected in strict accordance with European standards. <br>The front stage uses one 12AX7 and two 6SN7 vacuum tubes; the driving part uses two 300B electronic tubes to amplify the rear stage. <br>The front stage uses a 274B (fishhook style) for rectification <br>The rear stage uses two 805A vacuum tubes for class A single-ended power amplification <br>Five groups of signal input A, B, C, (D) BALANCE, E (PREIN) This machine is specially equipped with balanced input function and pure rear function <br>Power on mute delay function, soft-start feature to prolong tube life (about 30 seconds). <br>Infrared function remote control <br>Use Japanese high-end potentiometer <br>Easy to install plug in vacuum tube shield <br>Peripheral power tube bias current adjustment function and power output level meter sensitivity switch <br>Soft, pure and sleek sound, suitable for listening to various types of music <br>Product parameters: <br>Rated output power: 48 W + 48 W (RMS) <br>Machine frequency response: 12Hz - 35kHz (-1.5dB) <br>Input sensitivity: 280 mV <br>Balance input: 280 mV <br>Pure power stage: 1800 mV <br>Input impedance: 100 Kohms <br>Output impedance: 4 ohms, 8 ohms, 16 ohms <br>Harmonic distortion: 1% (1kHz) <br>Signal to noise ratio: 90dB <br>Left and right output balance: above (+-) 0.5dB <br>Power consumption: 380W <br>Vacuum tube: 12AX7 x 1, 6SN7 x 2, 274B x 1, 300B x 2, 805 x 2 <br>Working conditions: temperature: 0 to 40 degree Celsius humidity: 20% - 80% <br>Storage conditions: temperature: 20 to 70 degree Celsius humidity: 20% - 90% <br>Machine volume: (440 x 410 x 275) mm <br>Net weight: 42kg <br>Gross weight: 48kg <br>Power supply voltage: AC 120V 60Hz/50Hz