Looking for sound advice

Ok guys! First post here. Hope everything is Well

first I’m going to list any details I think you’d need about the car itself, then I’m going to list the audio I HAVE,
And finally lost what I am looking for, all in one shot, TIA for your time

1. ok, 2010 Prius 3 with a yellow top optima battery, refurbished fully working main battery , almost 200k miles, zero electrical issues, no light dim, you get it… car is in working order other that small mechanical needs.


2 I have the non nav jbl system, have replaced the front and back speakers with pioneer 6x9 and 6.5, 300w/200w max rms. Still stock tweeters and head unit. Have a LOC off the factory amp to a Rockford fosgate 12” 300w max rms powered sub combo (love it)

3. What I am aiming for is to keep that sub and CAN I also install a 4 ch or a 2 ch (your recommendations please) amp to power the door speakers while retaining the use of the sub


Thank you for your time.

 

I should
Mention I am indifferent as to whether I have to bypass or keep the factory amp, o am just looking for the best advice with minimal
Power draw

 

My end goal is to just install
A head unit; haven’t decided on single din or double yet, and just run the rca to the aftermarket amp for the door speakers and use the rca preamp to run my sub, total removal
Of factory amp
can I just remove it, physically ? I’m sure there’s a harness from metra or something that will allow this ?