It's best to add a power amplifier and modify the subwoofer to make car audio.

Because of the cost of the original car stereo, the overall effect will always make people feel blurred, and the separation and resolution are not satisfactory.

Of course, the simplest and most commonly used method is to change high-quality speakers.

The sound system also follows Konikin's law. Most of the original car stereos are composed of simple systems such as the main engine directly pushing the speaker.

In most cases, the first choice to upgrade audio is to replace high-quality speakers.