I have had two Ampeg BA 300 watt 115 Combos fail. The first one failed during a UK tour at a major venue. Basically it just went off and when I took it to an engineer, he said it was beyond repair and that the power amp board had "fried". Probably not very clever, but I bought another identical combo and it failed at the first soundcheck. Same problem. I took it to another Ampeg recognised engineer who got it working for three hours before it failed again. He said that the power was too great for the cicuitry. I notice Ampeg have discontinued this model (and the 600w one also). Ampeg used to have such a good name for reliability but these amps have really let me down. Has anyone else had similar experiences with these combos? I have had to resurrect my 25 year old Peavey TNT150!!