Scheda Amplificatore di Potenza HiFi 300B Vacuum Tube Fai da Te Classe A Amplificatore Audio Stereo 16W US
300B tubes Block----------- 2. 6SN7+300B single-ended output form design, high signal to noise ratio, background is very quiet. The preamp gain is high and the sound field positioning is better. The circuit is debug-free and easy to assemble.