the sub has 4 ohm dual voice coils and I wanna wire it to 2 ohms how do I wire it also it has 4+ and 4- terminals I only use 2 of each right? how do I know wich ones to use
That doesn't make any sense unless you have 2 pair of 4ohms dvc. You can't have 4 + and 4 - terminals. It should be 4 terminals all together. To drop down the sub to 2ohms, wire the pos from one voice coil to pos on the 2nd, and same thing for neg.