I agree with you about Spectrum reciever's. Making the switch to Futaba after the Holiday's. However, Let's say you put a amp and subs in your 1:1. Everything works and sounds great. But durning certain frequency's and amplitude output. You notice your lights are dimming. Amp draw! Will it kill your car? NO. A Cap stores current. So when you get a brief moment of higher amp draw. The total electrical system has enough voltage to properly function. So even though you may not have encounter any issues. You most certainly would benefit from a cap.