Big 3? And I am as well thinking about putting my old system in my new 04 gt .. 2 12 alpine type -r with a JL amp but my box is way too big .. Should I downgrade or customize a box ? .. And I don't want everything on my car to rattle anyway to Provent that .. I know dynamat is good but .. Idk and how do I get my faceplate and shift plate to come out without breaking it ugh
Big 3 referring to a wire upgrade in the engine compartment. (Block to ground, chassis to ground, positive to alternator) the bigger the wire the less resistance therefor giving you a .2-.8 more volts on the battery while running. YouTube it and google it you'll see. Is it necessary for you and me? Probably not, but when I have all the stuff to do it from my previous car then so be it.
And is your box now ported or sealed? I would only make a new box per the cubic feet needed for it to sound right. And for dampening I would use dynamat, second skin, lizard skin, all of them work pretty well. Whatever really you can afford