\rHi Chad,
This volume control has a setting for 8 pairs; however, that is on the amp total, not the OVC100. Although the OVC100 is capable of running 2 pairs at max, we do not recommend it for novice installers. In order to run more than one pair, you would have to wire it in parallel. The connections are made with the lead wires that are labeled and come from the bottom. The back of the unit is the outer housing, which is sealed for outdoor use. I hope this helps. CL/ MA\r