I recently bought a 2016 Toyota Tundra 1794 edition crewmax, which included a stock JBL audio setup with an amplifier under the passenger seat and an 8-inch subwoofer behind the rear driver side seat. I want to replace the door speakers, remove the stock subwoofer, and add two 10-inch subs behind the rear seats. I'm confused about the best way to go about it to ensure everything is compatible and adequately powered. The last sound setup I had I did myself in a 2002 Toyota 4 Runner, and it ran great, but this is a whole different level. I'm unsure whether or not I'll need 2 amps, one for the subs and one for the door speakers, or if I can get away with a 5 channel amp. I also don't know the RMS output of the stock radio/receiver and if it could adequately power the 4 aftermarket door speakers. I'm trying to spend as little as possible as I've personally found that spending the extra money isn't worth it. I put 2 cheap Hifonics 12" subs in my 4Runner in a cheap sealed box, with a cheap 1000 W Hifonics amp, and it sounded incredible for 10 years with no problem. Can anyone possibly make me a compatible build with everything included? In summary, I need 2 subs, 1 box, 4 door speakers, whatever amps are necessary to power the speakers and subs, and all wiring.