If you're looking to add more sound to your car, there are a few things you can do. First, check to see if your car has an auxiliary input. If it does, you can use an aux cord to connect your phone or MP3 player to your car stereo. This will allow you to play whatever music you want through the speakers.
Another option is to get a Bluetooth adapter for your car stereo. This way, you can wirelessly stream music from your phone or other device to your car speakers. Bluetooth adapters vary in price, but they're generally affordable and easy to find.
If neither of these options is available in your car, you can still get some extra sound by upgrading your speakers. Most cars come with factory-installed speakers that aren't really designed for great sound quality. By replacing them with aftermarket speakers, you'll notice a significant improvement in sound quality. Just be sure to choose the right size speakers for your vehicle; otherwise they won't fit properly and won't sound as good as they should.