So, I know for a solid state head it's not good to run it under the minimum allowable ohms (like, for example, running a head that says it has a 4 ohm minimum at 2 ohms is a bad idea), but what about running it at higher ohms than it states? I ask because my band just picked up a spare guitar cab, which is 16 ohms. No, I'm not planning on playing bass through it, that would be terrible for the speakers. We also have a spare head, a Peavey Mark IV that we use as a general purpose spare head, more often than not for guitar. On the back, it states that it's supposed to go into either an 8 ohm or 4 ohm load. This means that it can't be used to power the 16 ohm cab, doesn't it? Something bad will happen? Fire everywhere? Sizzles, smoke, tears streaming to the sounds of the gnashing of teeth? It's a bad idea to try it, right?