I put on a gig tonight night and the second band used an Ashdown MAG300 head with a Ampeg cab. After a couple of songs the cab went quiet but the amp still functioned, as did the DI signal to FOH. Unplugging the cab and waiting a while then plugging back in resolved the problem initially but then it happened again, so I jumped up on stage and swapped the head with my SVT4PRO that I brought along and no further problems.
So, is this a failsafe in the cab or head, or a problem with the cab or head, anyone care to make an educated guess?
S