So first of all I bought the 8 farad capacitor. I don't like how they lump a bunch of different capacitors on the same product page as most of the negative reviews are for the lower capacitors. The 8 farad works so well and for the money is the best value. I am running 2 amps and 2 10" subs of this and it runs everything without issues. As others have said, make sure you install it correctly and charge it WITH the resistor for the first time or you most likely will damage the capacitor. I love the lights and the digital display, this is the best capacitor I have owned so far and I have owned a lot. Please consider the 8 farad capacitor, even if you don't need one that big, it's worth the price for sure.