Works great but to all the people leaving bad reviews let me make some things clear… If your lights still dim… 3.5 farad isnt enough! on my 1200 RMS system it never drops below 13 volts. The plastic top is only flimsy if you pound it on stuff… Why are you people hitting it on stuff? You mount it to your box and leave it alone it shouldnt have to have a very durable top. The mounting brackets are perfect if you take the time to actually measure and not just eyeball it then complain it doesn’t fit right. duh! I have it wired perfectly mounted perfectly and I have good sound and no light dimming perfect product dont waste your money on any other cap.