Originally Posted by raptor660
Well havent listened to it at dark yet... but my volt gauge goes down to about 8 volts so voltage drop is quite significant.
Damn son, 8 volts???!!!
That'* crazy voltage drop. I'd definitely either not bump it that hard anymore or wire it back to 4ohms until you can get your voltage stabilized cause with your voltage dropping that low you're asking for problems far beyond frying an amp or sub. I'm gonna be honest with you, if your voltage is dropping that bad I can't imagine a 140a alt is gonna do much for you. Do you know any specs on the alt besides that? I'd be interested to know what it does at idle...I'd guess somewhere around 40-50a, you probably won't get full current out of it until about 2k rpm. How much is this alt gonna cost you? Hopefully very, very cheap as in less than $100 cause anything more than that you might as well save up for a nice 250a Mechman h/o alt or an XS Power D1400 and VCM. The battery is a 14v model and the VCM allows you to adjust the charging voltage of your battery. Mechman has a video up on YouTube that shows installation of the above setup in an older GM Truck with the stock 105a alt that'* pushing an RD Audio 1500 watt amp and two 12'*. At idle, system voltage was 16.4, at full tilt it only dropped to 16.3!
Are you really running 4ga. power wire? You really should upgrade to at least 2ga, 0ga would be best though.