Reddit mentions of KICKER 43DSC3504 3-1/2-Inch 3.5-Inch 30W 2-Way Speakers DSC35 DS35 Coax (Pair)

I've had a similar issue in my truck. That crackling/distortion is usually the speaker suspension failing, then the insulation on the coils rubs away and they start to short out.

There are a couple speaker options on these cars. Do you know if you have separate tweeters, or do you have the 6x9 woofers in the trunk?

If you have the standard crap-tastic base speakers I did, you can replace the front dash speakers with THESE. Those might work for the rear deck, too, though 4" might be a better fit. These are about the best budget option. The front is tricky as not all 3-1/2" speakers fit because of how cramped it is in there.

I don;t know about the woofers in the doors, though. I think those are 2 ohm and get bass signal only--meaning you don;t want tweeters on them.

I have the same 2015 unlimited sport and the speakers were pretty bad.

I have this amp mounted under the driver dash to the left of the brake pedal. There is a little cross bar. I fabricated a bracket out of an old steel computer case and some rivets.

4x of the Kicker 77KICK10. Those are a direct fit part and improve the quality by far even without the amp

4x of these 3.5" speakers to replace the stock paper crap.

After replacing all of these, this sounds great for me. I also have a 10" sub that runs off the same amp in the back that I can remove at any time when I choose to take my hard top off. I just googled some Jeep speaker replacement and managed to do it all myself.

This is plenty loud so that if I had the top off and going down the highway I would have no problem hearing anything, no crackling or distortion. let me know if you have any particular questions