I tried it this morning with nothing else on just to make sure it wasn't another component but the same thing happened. I just swapped all four tubes on the right for their exact opposite on the left. No thump. I only left the amp off long enough to do the swap so I am going to shut down for a couple of hours and see what result I get.
Thumping sound in right channel of Amp
I own a Cayin A88T for almost a year. I would say it sees moderate use. Recently I am noticing a rather loud thump in the right channel after the initial 30 second warmup. This can happen a couple of times during the first 10 minutes of having turned on the unit. After this time the unit sounds fine. I haven't altered anything on the unit which I bought new. From what I have been reading tube rolling is common practice with the Cayin but this is something totally new to me. I must thank Danlib for the detailed instructions he e-mailed me on biasing the unit.
Should i be concerned about the initial thumping, Will tube rolling solve the problem?
Should i be concerned about the initial thumping, Will tube rolling solve the problem?