I am currently running a 210 tvx and a 115 bxbw out of my peavey firebass 2. the minimum impedence for my peavey firebass is 2 ohms. my cabnets are each rated at 4 ohms, so together they make 2 when i run them both into my amp head. my problemo is that my amp sometimes overheats and certain settings, so i decided to check my cabs with a volt meter, according to my volt meter my 115 bxbw was at 3.4 ohms, and my 210 tvx was at like 3.1 ohms. i was wondering if this is a big enough change from what they are supposed to be (4) to make my amp overheat. also i was wondering if i could somehow correct the cabnets so they rate correctly at 4 ohms by mabey taking it in or doing something to it to add more resistance. thanx.