YAQIN MS-650B 845*2 Class A Single Ended Integrated Tube Amplifier with Remote Control SRPP preamp circuit& postamp circuit, wider frequency response, lower output impedance High power PSVANE triode 845 tubes,Large VU meters represent volume professionally and accurately.Multifuctional remote control included. Output transformer is made by Japan audio-specific oriented silicon steel sheet(0.35mm) and free-oxygen high-intensity enameled wire,To insure wide frequency response and bright tremble and bass Adopt audio-grade Electrolysis and Philips MKP AC capacitor and high-precise resistor. Japan ALPS potentiometer. Make it low-noise,quiet music background and durable. High voltage power supply is controlled by automatic time lapse to extend tubes life.20000 f per Channel and 40000f in total large pond capacitor .