I need a little help here. Im going to tap in where the stock wiring harness inputs to the Bose amp. Im removing all the bose garbage and installing my own. I just want to make sure the headunit has a high output or is it a regulated low level line output? Basicly whats the wattage without the bose amp. I could be wrong but Im pretty sure the headunits are all the same its the bose amp and speakers that change the power and sound.