scosche any good?
anyways, why are you thinking about a capacitor Pewter? most people do not know if they really need a capacitor, and end up wasting money...
a cap helps when you need amperage very quickly...a battery nor an alternator can keep up with the electron flow/demand of a quick deep bass note. For this reason some brands such as PPI have a extra bank of caps (used for storage not filtering) built right into the amp.


