1. Some cheap USB sound cards in order to save costs and increase output power, directly short the original isolation capacitor (straight capacitor), and the headphone coil has direct current circulation leading to heat.
2. It is easy to burn the headset or passive speaker (the active speaker has a power amplifier circuit, which is isolated at the signal input and has less impact).
3. It is recommended to buy a better sound card, the quality of the sound card will also have a certain impact on the sound quality.