What is the best option for sound system upgrades in the Kia Rio?

I want to upgrade the sound system in my Kia Rio, but I'm not sure which option is best. I've heard about different options like adding a subwoofer or changing the speakers. What would you recommend?

If you're looking for a budget-friendly option, I suggest adding a subwoofer. It will give you a noticeable improvement in bass without breaking the bank.

If you're willing to invest a little more, I would recommend changing the speakers. This will give you a more overall balanced and clear sound.

For the ultimate sound upgrade, I recommend changing both the speakers and adding a subwoofer. This will give you the best of both worlds and greatly improve your listening experience.