Got my first car, really wanting to upgrade the audio. Curious if I should upgrade the midbass/tweeters in the front as well. I would love to know a good sub recommendation. 2010 Mini Cooper Hatchback
Try crutchfield.com for suggestions. Type in your vehicle, and they will provide suggestions. Usually, aftermarket speakers will; be an upgrade over factory speakers. However, I don't know the quality of the mini cooper speaker system.
Try crutchfield.com for recommendations. Usually, aftermarket speakers are an improvement over factory speakers. However, I have no experience with the cooper factory speakers. Look at the Polk audio 8" subwoofer. That should be adequate for the space you are working with.