Installed on a 2021 f150 and sounds good so far. It fills in the missing base that was left out when the speakers were placed at the factory. Touching the rear speakers was painful, especially the way I chose to. Find 2021 f150 sub install and master cave for the tutorial. I will add my experience in the future. At the moment I'm satisfied. 1 week - update: I had to reset gain and audio settings in sync 4, YES 2021 stx comes with sync 4 and wireless carplay! I also feel like the subwoofer is breaking and now I feel more natural! So far a good sign. I've also added a video tutorial on how to wire the power cord! I still haven't installed the subwoofer and somehow it stays in place. That is hard. Share more comments in the future!
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