The next question I'm seeing a ton of. The part scratched out may have been the second plug. I can't remember for sure why I ran that set up anymore. It's been at least 6 years since we got rid of the 626. The breakdown is straight out of the books at a Mazda dealership I had to visit when I couldn't find this info easily...ran a Sony headunit (and I've never had a problem with the stuff... ) driving one of the factory amps.