I run capacitors on all the stereo's that I've installed , Lightning Audio in both of my F 150's not sure what farad they are. Price I think was around $150 I think but that was a few years back . The Focus I'm running a a Tsunami capacitor again been a while since I purchased it so I'm not sure what Farad it is . Also have HO Alts on all the vehicles and Optima batteries along with upgraded power wires , speaker wires.
Focus has all the above and also the big 3.
Team Duratec #01,Sedan Revolution#4, Elder FocusedSlayer, Gump Crew 21
February 2012 Sedan of The Month