Unfortunately the unit doesn't seem to be able to run for more than a few hours without without crashing, audio doesn't stop but you can't control the system with either the app or the wall controller, you then have to power the unit off and on again to regain control. I also had issues with the pre-amps when I first set the unit up being massively different volumes. I have had two MX-8A's now and they have both had the same issue.