First, they sold me a cap for my system, telling me the usual BS about how I need it for the amps to get constant power and for the vehicle's electrical system. Never mind the fact the amps I bought from them were JL, which are regulated, meaning they provide the same power no matter how much voltage you feed them, and a cap doesn't really do anything for them. As for the vehicle's electrical system, they didn't even bother recommend I see if I needed it first, they were just interested in getting as much money as they could out of me. Turns out, I pulled the cap out a few years later and ran without it for another couple years or so without any issues.
more