This product is a preamplifier without amplifier function. It can't be connected directly to speakers and passive speakers. It can't be connected to headphones and can't be connected to the car. AC12-15V power supply, be careful not to use DC power supply, can not connect to the phono amplifier.
Power supply: AC12V-15V, above 1A, the power supply does not exceed AC15V. (AC12V 1A power supply is recommended)
Tube: 6J3 tube
PCB board: board thickness 1.6MM (glass fiber FR4)
Product support tube: 6J1 6J2 6J3 6J4 6J5 6A2 6K4 6K5 6AK5 6AU6 6BA6 6BD6 EF93 6K7 GE5654 etc.
Power socket: DC3.5/5.5*2.1
The tube buffer is enlarged by about 2 times. Connected between the source and the front or rear pole.
1. This product can't drive speaker headphones.
2. The tube should be inserted in the end. When the switch is turned on, the tube light is bright, the tube is not plugged in, the backlight is on, and the product will not work.
3. It is best to use shielded wires for the connecting wires. Common wires may cause leakage or noise.
1Pcs tube preamp