IM A NEW MEMBER ON THIS FORUM I FIRST WANNA SAY HI TO TO EVERYONE, AND STEVE I ALWAYS WATCH HIS VIDEOS, I HAVE A SMALL PROBLEM WITH MY SYSTEM, FOR SOME REASON THE ALTERNATORS START WHINING REAL BAD ONLY WHEN THE BASS START HITTING, AND A SOON THE VOLTAGE GETS BACK UP THE WHINING GOES AWAY, I HAVE CHECK THE ALTERNATORS THEY ARE GOOD! IT NEVER DID THIS BEFORE. I HAD THE SETUP FOR A FEW MONTHS!, AND FEW WEEKS AGO THE SOUND START GOING ON... IT COULD BE MAYBE THE PULLEY? I BEEN DOING CAR AUDIO FOR OVER 7 YEARS NOW, I BUILD THE SYSTEM MYSELF, BUT I DONT KNOW WHATS GOIGN ON WITH THIS ALTERNATORS. I WILL APPRECIATTE ANYONES HELP....