The stock Jeep JL speaker size for a 2018 model is going to be 3.5 inch speakers in the corners of the dash, 4 inch speakers in the knee panel, and 3.5 inch roll bar tweeters. These of course can be upgraded to bigger sizes. There are even packages You can get from the dealership that will add bigger sized speakers. There are many websites and stores that You can go to, to look at all the different products to set Your Jeep JL with an awesome sound system.
phil
October 9, 2020
The sound bar subs are 4" as well, along with a 3.5" tweeter.
Lorraine C.
April 13, 2020
The 2018 jeep wrangler jl features 3-1/2" speakers in the corners of the dash, 4" ones in the knee panel, and 3-1/2" roll bar tweeters.
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