i already had a 600w rms mono amp for my bass and a 1.0 Farad Digital Car Audio Capacitor, and it was fine for a year , a few week ago i install a 200w rms American pro amp to run my door speaker and it happen every morning i had to jump my truck, i unplug that new amp for a week and everything went back to normal during that week i took truck to dealer for a 250 point inspection everything was fine ,i saw that my battery was a cheap factory battery so i got a optima battery i rewire everything 0 gauge front to back and 4 gauge on back to wire both amp and cap.after all my truck die agan , had to jump this morning
It may seem obvious to you already, but there's an issue with your American pro amp. It sounds like the amp is staying on all the time. Make sure the REM input only has +12volt power when the key is turned. The remote lead from the HU is supposed to switch the amplifier on, but if you've got a stock radio you might want to tap a fuse in your fuse box to get switched power. If it's turning off like it's supposed to, it has an internal fault making it a constant drain on your battery.