hi...i own a gx5 which up to now,,has worked real good & sounds nice..mainly used on 10" & 12" tops duty..plug it in today to do some set testing..after an hour,,channel 2,,which was running full range signal,,stopped playing output..signal is still being recieved as the green signal light for the channel still flashes..changed the cables,,still the same..changed the input to channel one & tried channel one speak on..it worked,,but as i touched da speak on at the back of the amp,,noticed it started cutting out..again,,tried different cables,,plug dem in & slightly touched the speak on while it was playing,,again cut out but input signal is there..double checked the set up & cables via another amp after this..everything worked fine so definately an amplifier output problem..amp has never been pushed into clipping over the 2 years i've owned it & the previous owner used it for monitors for a band so light duty...any ideas or help would be much appreciated..thanks..