$12.99 (as of 03/07/2018 05:05 PDT details )
Features:
- EASY TO INSTALL , 6J1 tube pre amp board DIY kits ,Easy to install,Stable performance, Excellent sound effects
- FILTER DIGITAL FLAVOR , Connect the 6J1 tube pre amp between sound source and amplifier, it will effectively filter digital flavor, the music and human voice will be relatively good.
- NO HUM , Eight 470UF capacitor filter is very clean, excellent power system lead to no hum, filaments are powered with DC 12V and need to be connected in series in order to reduce noise. Coupling capacitor is electrodeless electrolytic capacitor with high frequency and low resistance
- AC 12V INPUT , Use DC3.5 5.5 2.1 plug, AC 12V power adapter, if you want to use no plug AC 12V transformer, need to weld the power line on the circuit board. Please note that can t use DC power input, otherwise, it doesn t work.
- DIY , This kit comes in parts so you can assemble them together by yourself, enjoy the process of building your own tube amplifier