I recently purchased a Pioneer VSX-822-K with four Infinity Primus P163BK bookshelf speakers and a PC351 center. I like to listen to loud music and use the virtual surround settings to send it to all channels. I go as loud as I can without the music sounding distorted which is maybe 75-85% of max volume, assuming the numeric indicator on the receiver is accurate for actual power output. I have all the speakers set to "small" and crossover at 100Hz; using two BIC F12s for bass.
At this volume, depending on the music, I can often only listen for 5-10 minutes before the receiver shuts down in protect mode. The receiver is quite hot to the touch afterwards. It's in a wide open area with plenty of ventilation in all directions and I even experimented with adding a fan, but it doesn't seem to make a difference. All my speakers are 8 Ohms and I have double checked all the wiring is correct, using quality 16 AWG.
All my searching so far seems to indicate that it's pretty rare for receivers to overheat when they're properly ventilated, so maybe this is just a defective unit, but I wonder if I'm perhaps pushing the power output far beyond its intended use. I can send the receiver in for repair/replacement but I'd hate to go through that process and encounter the same problem again. Any suggestions? Does this sound like a defective unit or am I just too demanding?