you cant beat a sealed box for low end extension PERIOD, do the math :D i dont care what some program tells you, try it and RTA your response and post up the evidence, i can guarantee you that you will get a hump/peak at the tuning frequency of the box and it will drop off pretty fast after that :)
theory? maybe again try it and see the proof that caps do work and do what they are designed to do. a battery is only a filter for your cars electrical system, any good battery will do, yes a fast discharge one is better than stock, but as the old saying goes, if it aint broken why the ***k would you want to fix it?
anyway, you believe what you want to believe, but until you have PROOF, dont blow smoke around :p
