Audio Systems: subwoofer, alpine headunit, opel corsa


Question
hello, i have installed a alpine headunit, along with a mono jbl amp -1100rms, and also a hifinocs 15" sub -750rms. when i play the music very loudly, the bass cuts out from the subwoofer, the speakers continue to play. why is this? it is the amp or the sub? also my headlights dimm when a song with alot of bass is played. how can i solve this problem? thanks. btw- ive got a 1.2 opel corsa.

Answer
the jbl amplifier needs 12 volts 90 amps  your full electric system in the car is under 65 amps

when the amplifier see voltage of 11.0 volts it turns off
so there is nothing wrong with your system

just go to the autoparts and buy a battery mount in the trunk next to the amplifier or very close  
if you drive like crazy secure the battery

also if you have a capacitor unplug it and give it away
good luck