Generally speaking, a sound system for a car costs between about $100 to $3,000, depending on the brand and what you decide to buy.
If you just switch out the old head unit, this can cost about $100 to $200. But if you add new speakers, an amplifier, tweeters, and a subwoofer, you can reasonably expect to pay thousands of dollars, especially if you hire a company to do the installation.
If you’re on the low end of the budget spectrum, here are a few brands to explore:
For buyers who have no budget, some mid- to high-range options for your audio needs are: