Pre-Amplifier Tube Stereo Buffer Preamp for Digital Amplifier Bluetooth 5.0
Bluetooth adopts QCC3003 Bluetooth 5.0. Fourth, check whether the tube is plugged in with the base. Using 6J1 tube. Size: Deep 157mm x Width 126mm x Height 44mm (without tube height). The main filter is from 470UF/25V, and the coupling is 1UF.