The last saturday was the first time that I used my speakers, 1 hour and half, 1 speaker cut the soun 10 minutes before finish, I checked all, imput signal, power on, alamr, etc. all is ok. When the activity was off, I turned power off and turned power on again and the sound came back, I think that the problem is the upgrade on the speaker, when I did the upgrade, the speaker do a 'pop' sound when turn on and I select the DSP Presets, this problem 'showed up' after the upgrade.