Now u know how a car shares pwr with everything an when u hook up a amp/subs etc...more pwr drain. Since I have this sheit hooked up with anything that will drain pwr (usual shiet an indiglo gagues), when the speakerz hit, it makes the pwr/lites in my car kinda pulsate like its eating up all the pwr? Did I just answer my own question..? Basically...do u think tis a bad wire or maybeh...bad connection? The battery iz stock so you think that can be another thing? GImme ur opinons~

get a capacitor

or check on a recoiled altenator