Hi! I have a 2018 GT and want to add better speakers without going though a major renovation. Are there any good speakers that are direct replacements that will do the job?
Go to www.crutchfield.com and enter your car info. It will show you what the speaker sizes are for each location, even if you decide to buy from elsewhere.
If your car has the factory head unit and amp you will want speakers with the highest sensitivity you can get as they will be more efficient. Speaker brands like Focal, Diamond Audio, Morel, etc. will have a lower sensitivity and take more power to get volume out of them. Infinity, Kenwood, Pioneer, etc. will have higher sensitivity and get louder quicker on less power than the higher end speakers. Lots of the guys with the F-150's and the B&O system are using the Infinity and Kenwood Performance and Infinity Reference series speakers (sensitivities of 92 db or better) and getting really good results.