California Subwoofer upgrade?

[Rthol21]

Have the 22’ Platinum B & O sound, was very disappointed with the audio quality. I think my old 19’ Ranger Lariat B & O sounded better. Have been doing some thread searching to figure out the best route for a subwoofer upgrade. I don’t need anything extreme, I’m 15+ years remove from driving around in my high school years with 2 10s and 12 in the back. But I do still want more bass than what this B & O is pushing. Is Stealth the way to go? What about a small 6.5” in addition to the current system or replace the current sub with a better of same size or larger?
Any advice helps

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[Barbariansuperdad]

I upgraded my bass to 2 Kicker comp CWRT12 inch subs in an enclosed box under the rear seat. CWA1200 kicker amp to power them both. Amazing bass but I like a lot of bass. It’s all controlled with a bass knob so I can turn it down or up when I want. I haven’t replaced the front 6x9 and tweeter or the rear 6.5 yet. The subs and amp were $1600 installed. No effect on the range that I have noticed.