I am trying to connect 2 pairs of speakers to a volume control. I can see in the setup guide that you can connect the 2 pairs and I have set the jumpers appropriately for 2 pairs of speakers, but there is only one pair out from the volume control. I have made myself a y slitter with 16 awg speaker cable and it seems to work ok, but I'm not sure if this is the most ideal setup. Is there considered a proper way to do this, or some box I should be getting in between? This is for an unfinished basement that has only been framed so I want to make sure to do it right the first time while I still have easy access to everything.