Plinius 9200 Driving Magnepan 3.6Rs

Room Size is 14 x 19 and I was using MG1.6QRs but not happy with the construction quality ... thus testing out the 3.6Rs. To clarify, the amp runs warm when at modest volume but becomes "hot" when at higher volumes. I can hold my hand on top of the unit and not get burned, however it does seem warmer than I would expect. I guess the question is .. how hot is too hot??

Does the Plinius 9200 run in class A or AB?

The Amp runs in Class AB

If you can hold your hand to the fire [sorry], that sounds about right for a typical Class A amp. A less subjective measure would be to procure a digital or analog meat/oven thermometer and place it on/near the heatsink. 120F is the maximum value I'd want to see. My 35W class A Death of Zen runs there or slightly higher when pushed, which is rare as the speakers are high-efficiency and thus tax the amp that much less. Some feel No amp should be driven hard, but with Maggies the point is academic. That said, nearly any modern, well-designed [for 4 ohm loads] amp should work well. The Plinuius certainly falls in this category. If the PLinius is brigeable, perhaps a second one might solve the dilemma. But that's a lot of money to throw at this potential non-problem. Keep us posted and good luck.

UPDATE: I found out after talking to Plinius that their amplifiers run in class AB but in a very high bias mode (nearer to that of Class A than Class AB). They say it is normal and preferable for this to be the case and that provided no clipping/distortion is present, the amplifier's performance is not based on volume level, etc. just how cleanly it can drive the load. Apparently, Magnepans are basically purely resistive in load (easy to drive) as opposed to some boxed loudspeakers which have varying impedences (between 8 all the way to <3ohms) over the frequency spectrum. So ultimately, the trade off for me is efficiency. I will continue to auditon and make a decision based on my newly gathered information from all of you and Plinius (thank you!!).