My Jimmy isn't built yet so I can't tell you how this works for a Jimmy. But I have a 2000 Dodge Viper RT/10 and the factory sounds was atrocious. I changed out the paper done speakers in the doors for some higher quality speakers. But the bass still sucked and no space to put bass in.
My installer your me that the Kenwood under seat speakers are really low profile, comes powered with built-in amplifier. My viper has lowered seats by 1" so not a lot of space...
I put two into the viper and the bass is glorious for my type of music. No it is not so deep that it wakes up the neighbors kids three houses down, but for normal to high sound levels it fills in that mid bass that Rick music is so full of.
This is what I used. I'll probably use it on my Jimmy as well. Maybe under the back seat and the driver's seat.
https://www.amazon.com/Kenwood-KSC-S...=fsclp_pl_dp_2