6J1 Vacuum Electron Tube, Receivers & Separates Amplifiers Valve Preamp Amplifier Board Headphone Amp Parts Musical Fidelity Unassembled Kit for MP3/DVD/Mobile Phones

Connect the 6J1 tube pre-amp between amplifier and sound source such as VCD/DVD/MP3/IPHONE/ipad/MID/mobile phones, it will effectively filter boring noise, making the sound clearer and better.. 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. Using DC 5.5*2.1 socket and AC 12V transformer, you can also use AC 12V transformer without plug, just need to weld the power cord onto the circuit board. This kit comes in parts so you can assemble them together by yourself, enjoy the process of building your own tube amplifier. You can also buy one to your electronics hobbyist friend as a gift.