Luc, the volume setting on the receiver isn't really determinative of the power being used for particular material. If you have an SPL meter you can get a reasonably accurate picture of how many watts are being used at a particular instant. At a typical 9-10' listening distance in a typical room, M22s(mine and yours)will be using about 1 watt for a comfortably loud listening level of 85dB. If the meter showed a louder peak of 95dB occurred, that used 10 watts. If a much louder peak hit 105dB(about the maximum that should be even briefly used if hearing damage is to be avoided), that again used 10 times as many watts, i.e., 100. Depending on what the actual maximum capability of your receiver is(likely slightly higher than the rated number), it should be clean up to around 106-107dB. Note that even if the receiver output is clean at those levels that there may be some distortion heard from the speakers.
