dual vc means that there are two vc on the sub itself, you have to run both
dual 2 ohm you can run at 4 ohm or 1 ohm
dual 4 ohm you can run at 2 ohm or 8 ohm
good luck
dual 2 ohm you can run at 4 ohm or 1 ohm
dual 4 ohm you can run at 2 ohm or 8 ohm
good luck