Hey guys! I really need your help!! I built a system in the trunk (Magnat 400Watt + Power Amp 400Watt), and that makes amazing way really “wums” (small tip to all Audi 80 B3 owners, the problems have to get the bass in the interior, just separates the ski bag device, then it goes 🙂 ) My problem now is that the car after I turned it off doesn’t start! I connected the power amp to the radio, and of course at the Battery connected, and when the radio goes out, then the lights of the power amplifier go out! Then I just got 10 minutes before I turned off the car, turned off the radio, and when I turned off the car, still cut off the power supply at the back of the end stage, and this morning it then also jumped! Now is my guess that the alternator does not manage to charge the battery, because it is too much used by the system…!? On the other hand, have a lot of e i know even older and relegated cars, with 1000 – 1200 Watt systems and the jumping also perfectly on…! Maybe the further helps… my battery has 12 V, and 360 A…..but maybe it is also easily perfect, or can n short circuit be the cause, and should I just install a second…only where, and does the alternator manage to do that at all?? I hope one of you knows what could be his, and what I should do!!? Vilen Thanks already in advance! MfG.: André