Refurbished Trv-a300xr 300b Vacuum Tube Integrated Amplifier Audio Amplifier

  

Triode 300B vacuum tube pre-main amplifier with built-in MM phono equalizer. New vacuum tubes and side wood are already installed. Note that two AAA batteries and a driver for BIAS hum adjustment are not included. Modifications have been made to eliminate crackling noise, popping noise, hum noise, and crackling noise that occurs when using non-genuine vacuum tubes. A diode for heater power floating ground has been added to eliminate crackling.

Wiring has been twisted to reduce hum noise. A bleeder resistor has been added between the pre-amp and output to eliminate voltage exceeding vacuum tube specifications, along with the addition of the same ZD, R protection circuit.