yea pretty much Im running two amps(one stock one aftermarket) with the stock infinity speakers and a aftermarket hu

 

so this will work then without having power issues . wait one aftermarket you running different subs ? becuase i want to go flip out display and i want to know what i would need to get to run everything without power loss or underpowerment besides the adapter

 

your very confusing.... IF you want to replace the headunit...You need the adapter..period..........everything will be a-0k..