Plinius 9200 Driving Magnepan 3.6Rs

Hi .. I am fairly new to this site, however I do have a question that is on my mind. I own a Plinius 9200 Integrated Amp ... and am auditioning a pair of Magnepan 3.6R speakers. My question/concern ... when driven to acceptable volumes (volume control to around 11 o'clock or slightly greater) how hot should I expect this amplifier to run with the Maggie's load? It would seem to me that it's rather hot after about 30 minute's use, but I have no reference to compare it to. Should I choose more efficient speakers with a higher impedance?? Or is the Plinius a normally hot running amp. It is located in a well ventilated in an open rack. Any comments/advice would be much appreciated!!