I have recently moved to Melbourne, and despite the packaging and express instruction, it seems one of my monoblocs is not very healthy. Initially I suspected there was likely some sort of mechanical damage, but then on opening the amp up, I noticed that one of .47 630v Cast signal caps seems to be VERY oily.
I can't find any loose connections, and there is no other evidence of anything in the amp not being right. I have swamped the amp out and everything sounds fine; I have swapped the valves between amps and the same amp is still the issue.
Is this oily cap the likely culprit?