Ben, you do not need a 300amp alternator. Right now I'm running 1 massive p3000.1 @ 2krms and 1 massive p800.4 @ 800rms. On cruise I don't get any voltage drop at all. At red lights is where it hurts. So my advice to you, 220-240 would be great. I would look into iraggi, ohio gen, and ho alts. Iraggi is probaly the one you'll choose due to price/performance ratio. If it was me, ask Iraggi to build you a 240 alt that does close to 200amps @ idle and you should be fine. If your more of a cruising ground shaker, the amps at idle doesn't matter much. But if you like to bump at red lights, idle is important. If you get a 220amp, you should have 175amps @ idle. Depending on vehicle of course.
Not more so on the more knowledge. Its just from experience and asking Iraggi himself. Ben, if you want the best answer possible, and you decide to purchase from Iraggi, call him yourself and ask him. He will tell you which size will be best. Then ask if they can create more amps @ idle. I'm sure they can.
yea..u dont need a 300amp alt.. mannnn i wish i could get a new alt right now!! sucks...ooo well..i can manage a lil while without one..but yea..listen to those guys above me!!!
if you want the full power from that 2400 watt amplifier, you need to be able to supply about 250A of current for it, plus another 50 to 60A for the car itself, plus whatever any other amplifiers need in your car. If you don't plan to use the amp to it's full potential, and only plan to use it at low to moderate volumes, at a fraction of it's full power, then you can get away with a smaller alternator.. maybe 200-240A.