There are a number of reasons that speakers might emit a buzzing noise. Likely, the power supply for your speakers is too low/poor quality. I’ve learned that laptops are likely culprits for this. Also, a power strip or outlet that’s powering multiple devices may cause a hum.
It’s an improper ground!
Sounds something like this, right? One of your wires isn’t properly connected, or it’s improperly grounded. Here’s how to figure out where it’s coming from:
- Make sure your components are plugged into the same outlet pair. A surge strip would also work.
- Swap cables to see if that fixes the issue. Sometimes a cable (or interconnect) goes bad and you need a new one. Try replacing the cables that lead into your speaker with different ones to see if the hum goes away. If yes: perfect, you’re done! If no, the problem is likely somewhere else.
- Try using a different power cable.
- Test your outlet for wiring problems
- Check the back of your receiver or amp for a ground wire. While it’s unlikely your home system will have this, many car stereo amplifiers will. Make sure it’s attached or touching metal.
- If all else fails, it’s likely your power supply has a damaged or blown capacitor.