I wouldn't have any more concerns about the Cary SLI-80 than with any other amp. I owned one for a few years and regret selling it. It's extremely well built and I think it's a bargain in the world of tube amps.
I'm not sure what you mean by a problem with the tube. Which tube? I cycled through at least a dozen configurations of different power and preamp tubes with no issues.
If you do have any issues, the company is good about assistance with them.
I'm not sure what you mean by a problem with the tube. Which tube? I cycled through at least a dozen configurations of different power and preamp tubes with no issues.
If you do have any issues, the company is good about assistance with them.