<br>Reisong A12 Amp is an upgraded version of A10, could use more replacement models of tubes without convertor. Come with Tube Cage. <br>Point to Point hand welding, preferred audiophiles, output transformer switch to the 76x40 higher end output transformer. <br>Please pay attention before buying!! Nice sound but LOWER POWER.If you like high power or your speakers do not match, it may cause sound distortion. <br>Specification: <br>Output Power: 6W * 2 (Ultra-linear). <br>Frequency response: 20Hz - 28KHz. <br>Output Impedance: 4,8Ω. <br>Total harmonic distortion: ≤ 1% (1kHz). <br>SNR: 88dB. <br>Voltage amplification: 12AX7(ECC83) × 2. <br>Power output tube: EL34 × 2. <br>Rectifier tube: 5Z4PJ × 1. <br>Input sensitivity: 750MV. <br>Input impedance: 100KΩ (2 groups input) <br>Dimensions (W × D × H): 310 × 268 × 165mm. <br>Power Supply Voltage: AC 110V - 120V / 50Hz-60Hz (For United States) <br>Power consumption: 78 watts <br>Features: <br>Power Transformers: new imported 0.35, stack thickness 50MM (96-50). <br>Output transformer core: new imported 0.35 (76*40upgrade version). <br>Chassis: imported mirror stainless steel chassis. <br>Corners aluminum column: high-grade aluminum CNC machining, diamond knife speed car system. <br>Output Block: High-grade export base, with a transparent cover. <br>12AX7 (ECC83)pre-voltage amplification. <br>EL34 as power output. <br>Potting type output transformer, to ensure the stability and reliability of the output transformer, especially in the southern humid places, have a more reliable performance. <br>Output transformer with a new imported 0.35 core manufacturing, high-purity copper wire package enameled, layered segmentation, string and connection method, divided into three clips two around the system, <br>Output transformer transformer housing with high-grade stretch hood. High temperature paint surface treatment, bright pattern processes. Nissan ALPS potentiometer. <br>Imported 0.35 thick core manufacturing power transformers