Think about this for a second. OK i have the AQ 2200D and i clamp tested in on stock electrical, only upgrade is big 3 in 1/0. When i load tested it it was ACTUALLY doing higher output then rated. That amp has (1) 1/0 inpput. My point, theres a reason they built that amp with 4 gauge inputs. I doubt you would REALLY notice a difference if you added another 4 gauge terminal to the amp via the blocks. I would maybe invest in a bigger battery, High output alternator, bigger amp, bigger subs, etc. this is just my opinion. You can always clamp test the amp and see what it is doing. JUST MY 2 CENTS.