How to Solve the Current Noise After Installing a DSP?
2 Answers
Solutions for current noise after installing a DSP are as follows: 1. During the installation of the DSP, the wiring for the signal input part should be as short as possible and firmly connected or soldered. 2. Use three-core or four-core shielded audio cables for the signal lines. When connecting, the shielding layer near the amplifier end should be grounded at a single point. 3. If noise persists after the above methods, shield the entire amplifier with a metal casing, ground the metal shell, and add high-frequency filtering components to the power supply section of the amplifier. The functions of a DSP are as follows: 1. Noise Reduction: The listening environment inside a car is very harsh, with road noise, tire noise, engine vibration, etc. The DSP amplifier removes in-car noise through A/D conversion, creating a pure listening environment. 2. Frequency Division: The DSP's frequency division solves the problem of poor connection between high, mid, and low frequencies. It also features a 31-band EQ adjustment system, allowing for flexible adjustment of gain at various frequencies. 3. Delay: The positions and distances of the speakers in the car vary. The DSP amplifier adjusts the timing of sound emission from the speakers, ensuring that sounds from all speakers reach the ears simultaneously for better music quality.
I previously installed a DSP for my car audio system, but it produced a buzzing noise as soon as I turned it on, which was really annoying. After troubleshooting, I found out it was due to poor grounding—the grounding point on the car body wasn’t properly chosen, and the surface had paint, leading to poor contact. My solution was to clean the metal surface and choose a clean spot to solder the ground wire, which fixed the issue. I also used a noise isolator to help resolve the problem. Wiring is crucial too—avoid running signal cables parallel to power cables, as this can cause interference. When adding a DSP, make sure to use high-quality cables, as cheap ones can introduce humming noise and, over time, degrade sound quality or even damage the equipment. I recommend planning the installation location carefully before modifications, keeping it away from the engine and ignition system wiring. After completing the setup, test it multiple times to avoid repeated adjustments.
