How to get more power?

[wesb]

 I have a 2024 F150 with the 5.0 engine and I'm running (2) Sundown 18'' subwoofers with their Sundown Salt 6K but my charging system is ran from a Linbus system and there isn't any options available for an upgraded alternator. What would I do or how to be able to get more power to be able to play longer and louder,  I'm currently running an isolator and (2) compact 22AH 12V Lithium batteries just for the Salt 6k while keeping the factory under hood battery. I'm not too knowledgeable when it comes to electrical so I figured if I'm limited or if there's any options for my setup?

[All_Ears_On_Me]

Try researching LiFePO₄ and/or DC-DC Charger.