What Causes the Weak Sound of Car Tweeters?
3 Answers
About the reasons for the weak sound of car tweeters, the following explanations are provided: 1. The weak sound of tweeters may be caused by the lack of a crossover capacitor. In this case, a crossover capacitor can be installed to improve the sound. When installing tweeters, it is essential to go to a professional institution for the work and purchase reliable products. If you have high requirements for sound quality and the tweeters in high-configuration models offer better sound quality and are from well-known brands, it is recommended to directly choose the high-configuration model. 2. After modifying the tweeters, you can opt for full-vehicle sound insulation. When performing full-vehicle sound insulation, it is also crucial to go to a professional institution and use high-quality sound insulation materials. Additionally, be careful not to damage the original vehicle wiring during the installation of the tweeters.
A while ago, while tinkering with my car audio system, I encountered an issue where the tweeter volume became noticeably weaker. After troubleshooting, I identified three common causes: First, the aftermarket speakers were of poor quality—those cheap metal-diaphragm ones bought online for a few dozen bucks tend to vibrate abnormally when damp. Second, door panel resonance interference, especially in modified cars without added soundproofing foam, can absorb high-frequency energy while driving. The trickiest issue was the head unit’s output problem—testing with a multimeter revealed that an amplifier module bought from Taobao only delivered 2V output, far below the standard 4V. My advice: first check for oxidized (greenish) wire connectors, then test with a pair of branded used speakers, and finally consider adding a DSP for tuning. Remember, reversing the crossover can also lead to insufficient sound pressure.
Last time I encountered this issue with my old Accord, an experienced driver taught me a simple three-step troubleshooting method: First, press the horn grille with your hand—if the sound returns to normal, the diaphragm might be deformed or stuck. Next, increase the volume for testing—if there's distortion, the horn is likely burnt out. Finally, pay special attention to the wiring along the A-pillar! In my case, I found the waterproof seal was pressing against the crossover wires, causing poor contact. This problem often occurs in cars over six years old, as aging rubber allows moisture to accumulate in the doors and corrode the wiring. If you're handy, you can remove the door panel, clean the oxidation from the connectors, and spray some WD-40. If a newly replaced horn sounds weak, there's an 80% chance the positive and negative terminals are reversed.
