To get the best sound from your car speakers, you should follow these steps:

1. Determine the correct size of the speakers for your car. The size of the speakers should match the size of the openings in your car's doors or dashboard.
2. Choose a type of speaker that is compatible with your car's audio system. There are three main types of speakers: full-range speakers, component speakers, and coaxial speakers. Full-range speakers are the most common and are a good choice for most car audio systems. Component speakers are more advanced and offer better sound quality, but are more difficult to install. Coaxial speakers are a good choice for a budget-friendly upgrade.
3. Install the speakers according to the manufacturer's instructions. This usually involves removing the old speakers and mounting the new ones in their place. Make sure to connect the wires properly and use any mounting hardware that is provided.
4. Adjust the equalizer settings on your car's audio system to get the best sound from your new speakers. You may need to experiment with different settings to find the right balance of bass, treble, and mid-range frequencies.
5. Consider adding an amplifier to your car's audio system if you want to increase the volume and improve the overall sound quality. An amplifier will allow you to get more power and clarity from your speakers.

I hope these tips are helpful! Let me know if you have any other questions.