Is it time for new tubes?

[jhguitar1]

I have had my Roadster for over a year. I had a great tone about 2 months ago, but now the amp just seems to have a blanket over it and sounds very dark. I am not liking it. The only thing I have changed is that I tried putting a RCA 12ax7a in the V1. Does it sound like I am due for a tube change? Will that bring the magic back?

 

[ShamefulAddiction]

Power tubes.

 

[VijfZiel]

The power tubes man... Check also the built in variac switch, remember that if you use your amp in bold mode, it would wear down the power tubes more rapidly...

 

[espresso]

Sounds like the power tubes. Mine started to go after a year. You'll need new ones sooner or later so may as well get them and try.

 

[jhguitar1]

Thanks for the help. The tubes I am going to replace are the SED 6L6's. I am thinking of trying something different just for the heck of it. I was thinking of putting in KT88's. Anyone ever tried these with their Roadsters? If I do go with them, I am between the JJ's and the SED's.