2021/22 6 speaker audio upgrades?

[FranklinCounty4Door]

I have a 2022, before they added the subs . What are those of us early 6G broncos doing to add a sub? I’d like to go the JL Stealthbox route but I obviously don’t have the grill cutout or even know what’s behind that panel on the 22. I’ve been behind the panel on a 23 but what’s back there pre 23? Don’t really want to hang one off the tailgate either. What are you doing to pull amp signals? I plan to replace every speaker with JL and find someone to change my audio settings with forescan.

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[frdfan]

@RagnarKon has a full YouTube series replacing all his factory speakers and the addition of a sub in the same location as the factory. Here's a link to the sub install video.