Hi, I know there are a ton of threads about understanding ohms and I've been surfing them for a while trying to figure this out, but they seem pretty case-by-case and I can't get a good handle on how it all works, so I'm gonna ask anyhow. I have a Mesa 400+, and I'm playing through a 4x12 cab with two separate inputs, each input corresponding to two of the speakers. When I bought this cab, I was told that it was wired at 4 ohms, but it has no labeling. Because I'm using two of the outputs on my mesa and my single cabinet with two inputs is essentially acting as two separate cabinets, I'm trying to figure out which ohm setting I should be using. btw, the label above the two inputs right in front of the second tube from the left on the image below says "SPEAKERS: 2 OHM LOAD (eg. two 4 ohm cabinets)" THANKS SO MUCH!