You're correct.. my setup in my Escalade is a 390 amp alternator, 1/0 gauge wires, 3 XS power 3400, 2ds18 4,000.4 for my horns and my mids, a Orion 1000.4 for my 12s mid bass, and my Taramp bass 8K running at 67 ohm with my 3 American bass XFL 1544s. I'm at 15 volts but about half a song into...