Fuhjythy Bluetooth Tube Preamplifier Fever Hifi 6J5 Bile Vacuum Tube Preamp NE5532 Pre Amplifier Tone Control Board

2. The capacitor uses the 470UF/25V, and the coupling capacitor uses the capacitor 1UF. 1. Using 6J5 tube, NE5532 4. The PCB adopts 1.6mm thick double-sided sheet, 2.0 oz copper thickness, and the whole process of tin-spraying ensures the good passing performance of large and small currents. First-class PCB quality. 3. The resistor uses high-precision chip resistor to a good signal-to-noise ratio of the whole machine. 5. The input and output are made of gold-plated lotus seat, which is and beautiful.