Exactly what Darthborg78 said! You will need an amp to power the speakers and subwoofer. The headunit won’t supply enough power to get the most out of new speakers. Add a LOC/DSP with the amp and you’ll be set! Replacing the speakers without an amp will add some clarity but the music will be missing that vibrant sound since the speakers will have very little power powering it. Also, don’t go to any car audio place. Find a place that does custom builds/3d printing since they offer higher quality work. I went a little crazy with my set up, its on my profile if you want to see 9apps