LOC / Mono Block amp and Sub question

[pghram1500]

Hey all, I have a 2017 Ram 1500 Rebel with the non alpine stock system, so I do not currently have a sub installed. I am looking to install a single 12" sub with a mono block amp. I have been reading so much that I am confused on two parts if someone could please help me out. First for my LOC, do I need just a normal decent brand LOC. I keep reading about the Audio control LC2i. Sounds like a great unit but do I really need that for just a mono amp going to a single sub. This is an expensive truck so I do not want any feedback or noise on the line. Secondly can I hook into my rear door speakers with the LOC instead of behind the head unit. Seems to be people on both side of the fence on this. Finally if I do hook into the rear door speakers, do I have to do both or can I just hook into one? Second part of that question if I do just hook into one on the LOC do I tie the right and left together and hook to the one door speaker or just cap off whatever side I do not use. Thanks for any replies. Really want to get this going but need some assistance first.

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[LosIsATool 5,000+ posts]

The loc needs a full range signal or you won't get sub bass.

The LC2 is perfect for this. It will restore low end taken away by the stock source.