If rockford told you that they make the best car audio products around would you believe them?
Well, they do tell people that.....and no, they don't make anything that excites me or just about anyone who knows **** about car audio
You can run any amplifier off a 100 ampere alternator, but a high output amp is going to kill it if you listen to your system a lot at high-moderate volume. I've witnessed the smoking death of at least a dozen alts in both my and my friend's cars. If you want to go out every six months and buy a new OEM alternator, that's cool.....but I'd rather spend my money on a shiny new 200+ amp alternator that I know won't die no matter how hard I push it.
The secret to making car audio and electrical components last is pretty simple:
BUY STUFF THAT IS REALLY HARD TO BREAK.
If you think you're going to need 120 amps to run your amplifiers and keep the motor and power windows operational, get a 160amp alt just incase you want to upgrade later. As was said before, a 160amp alt working at 60% will last a lot longer than a 100amp alt working at full tilt.
If you have 600 watts RMS to supply to your subwoofer, buy a sub that will handle twice that. If you need an amp to power your subs, buy one that's twice as powerful as you need and run it at a higher impedence. Pushing stuff to it's limits time and time again is what causes **** to break.
"There is no 'I' in Tag Team"
Project 'rex: Coming Soon to An Eardrum Near You