6N1 Tone Adjustable Board Volume Tone Control board Preamplifier

n using original Beijing 6N1 tubes 

n electrolytic capacitors imported Nikon and South Korea three camps electrolytic coupling capacitor Siemens, output using SPIRIT 2.7UF, to ensure a steady flow of power to support strong. 

n selection of tetracycline resistance 1W metal film resistors, ensure the machine a good signal to noise ratio. 

n PCB using double-sided sheet 1.6mm thick, 2.0 oz copper thickness, HASL whole process to ensure that the size of the current through the good performance. PCB-class quality.