Situation: I have two iso cabs I use for recording. One has a V30 in it. The other is about to have a red white and blue (120watts) in it. Both are 8 ohms. I tend to use them linked together, which is supposed to wire them in parallel making the two 8 ohms 4 ohms, as that's what most of the heads I use call for. I only record one at a time, so I don't care about one speaker being louder than the other. But will it physically harm anything to use the speakers together in this way?