Last night I downloaded the anthem calibration tool on my laptop. I'm running 5 channels, no sub. Called anthem because I had trouble with the microphone not being detected and also after the USB update on the mrx720 my network became disconnected via network cable. The fix for network is power off and disconnect power cable to mrx, then push main power button 6 times, reconnect power cord, power system on and after a couple minutes network reconnects. Another thing I did not no was if you are running 5.1 don't connect amp to rear pre outs, you need to use surround outs. This was why the calibration will only work on front 3 channels. Once changed to surround speakers, everything works flawlessly. I did upload my first calibration file. Did not get a chance to watch a movie, but I did listen to some music. WOW what a difference. Everything sounds so much better, imagining is excellent along with bass. I'm very very happy with the performance. I do lack the knowledge of setting system settings, but the anthem ARC does the perfect job for people who don't have the knowledge to do there own adjustments. I will give a review on ht once I time to watch a movie. Anyone considering the anthem, I personally give it 5 stars. Also thanks for help from Jamie at anthem, extremely helpful. April anthem will be releasing the apple version of arc and I was told it will be easier and more friendly adjustments. Pete