Hi everyone, is it possible to downgrade the firmware on the A&H DB4? With version 2.2.2, I am experiencing an issue with the channel trim levels. The gain is excessively high, and even a tiny turn of the knob causes an overly sharp increase in volume. Could it be that release 2.2.2 set the range to +/- 20? I would do much better with a +/- 10 range (perhaps it was like this in a previous firmware version). Thanks a lot!