First question. Where is the amp located that powers the 2 subs in the rear door.
Second Question. The speaker signal going from the head unit to the amp that powers the subs, is it a high level signal or low level signal.

 

Amp lies behind the subwoofers in the back door. Attached to them actually

 

Not on a DII. The amp that powers the entire system is located under the front drivers seat.

 

Gotcha. Sorry for the misinformation OP

 

lol that's why i couldn't see it behind the speakers. Now does anyone have a answer to my second question. The signal coming from the head unit to amp for the sub, is it a high level signal or a low level signal.

 

i am pretty sure it is a high level(speaker level) inputs.