Situation: Currently, I have a gk mb500 amp paired with an Avatar Neo 210 (4ohm). After being used at a moderate volume (turned up halfway on the pre and a little more on the master) for around an hour, the gk's fan turns on and the volume drops significantly. The amp becomes unusable at this point. I have spoken to multiple amp techs and they suspect that the neodymium speakers are heating up to the point where the ohmload is spiking below 4 ohms significantly more than it should, causing the amp to overheat and shut down. Solution: I am looking into buying a used gk neo 410. Question: Should I get the 4 ohm version or the 8 ohm version? I don't plan on getting louder than a 410 which is why I am leaning towards the 4 ohm, but I am worried that the same neodymium heating issue/ohm issue would happen that put me here in the first place. I also am thinking about getting the cx series which has ceramic speakers that has recently come out, but I know that the neo is tried and true.