I will be doing some kind of LOC with my factory headunit so I can do aftermarket amps and subs. My question is should i be connecting my headunit directly to my LOC, by passing the amp or should I connect from the amp to the LOC? I read a bunch of threads and I see people doing both types. Some people say do directly from headunit, but then I read the voltage out of the heaunit is very low, blutooth quality suffers and there could be possible features missing if you by pass amp. Some people say from amp but then summing is needed, signal is amped and noisy, signal could be crossed over and eqed. What should I do? Dont want to lose any features. My installer is asking as well.