The main role of speaker series capacitors is to filter out low-frequency signals and ensure that high-frequency signals can be transmitted to the speakers, thereby protecting the speakers and improving the sound quality.
Specific role and impact
Filter out low-frequency signals: Connecting capacitors in series on the speaker can block the passage of low-frequency signals and ensure that only high-frequency signals are transmitted to the speaker, which can reduce the distortion and power loss of the speaker.
Protect the speaker: Since the power of high-frequency signals is relatively small, series capacitors can protect the tweeter from being damaged by high-power low-frequency signals.
Improve sound quality: By filtering out low-frequency signals, the sound output by the speaker is clearer, reducing distortion and abnormal sounds.
The impact of different types of capacitors
Small capacitors: ESR (equivalent series resistance) is large, suitable for high-frequency resonant circuits, and can transmit higher frequency signals.
Large capacitors: ESR is small, suitable for low-frequency resonant circuits, and can transmit lower frequency signals.
Actual application scenarios
In car audio systems, tweeters are usually connected in series with capacitors to filter out low-frequency signals to ensure clear and undistorted sound. At the same time, this design also helps protect the tweeter from being damaged by high-power low-frequency signals.