Details:
1. Using original 6J1 tube
2. The board layout is reasonable, beautiful, and the current is small.
3. Bluetooth adopts Qualcomm QCC3003 Bluetooth 5.0
Basic parameters:
Power supply: DC12V2A (DC)
Net weight: 0.55KG
Dimensions: deep 157* wide 126* high 44MM (without tube height)
Tips:
1. This finished machine is a preamplifier, not a power amplifier. It should be used with a post-amplifier or an active speaker. It is not allowed to directly connect a passive speaker, a speaker or a headphone as a power amplifier; it cannot be used, and the voltage of the car is unstable. Burn it off.
Second, the general audio line or power supply filtering is not good, the probability of the bottom noise current is very large, it is recommended to use a good audio cable or power supply.
Third, to ensure that there is no problem with your own sound source, the preamplifier itself has a preamplifier function. If the sound source itself has noise, then the preamplifier will only amplify its noise. Please use a good sound source test.
4. Check if the tube is plugged in with the base. Please insert the tube and the base well. Be sure to insert the tube in case of power failure.