OK if you have a dvc sub thats 4 ohms take all the +s and -s wire them in a phrase all of them together all the plus and all negitives and so on so forth to the amp this will create a 2 ohm load on your amp on and if you had a 2ohm dvc sub it would be a 1ohm load on your amp now its basically the same with a svc sub if you have two of them like for say 2 4ohm subs that will be a 2ohm load and 2 8 ohm subs will be a 4ohm load. If you dont understand reply back with what you dont.