G'day all, First off, I have chosen my name with care, which gives you an idea of my technical knowledge. I currently have a Luxman C-02 pre-amp (class A) combined with a Rotel RB 971 Mk II (class A/B) poweramp. A while back I was thinking about switching the Rotel for the Luxman M-02 thinking it might (obviously?) be a better match as it was sold as part of the ’02’ set. I have no idea if a class A pre-amp automatically implies that the M-02 is a class A as well. I have never managed to find any proof of that. The bigger brother M-05 obviously is as it has two huge ass fans at its rear. If in fact the M-02 were to be a class A, it could produce quite some heat which could turn out to be a problem due to my somewhat confined setup. The more I searched, the more confused I got. It led to several questions what actually happens with the set up I currently have and when I hook it up to the M-02. 1 Will there a (significant) audible difference in hooking up an A class opposed to an A/B to a class A pre-amp? 2 Will there be an increase in heat in the pre-amp when hooked up to a class A amp? 3 What happens technically when connecting different classes? 4 Does anyone actually own an M-02 that can tell be about the actual heat it produces.