Usually the sound gets thin, dull, and lifeless, when tubes are nearing the end of their useful life. You lose dynamics, the bass get soft, and loose, and the highs seem rolled off. Most times, it is so gradual, that you don't notice, till you install, new tubes.
Sovteks usually last for 1-3 years, depending on how much you play them. NOS types, tend to last 5-10 years, under the same circumstances. I think most NOS tubes, are sonically superior, by a long shot, to Sovtek tubes.
Sovteks usually last for 1-3 years, depending on how much you play them. NOS types, tend to last 5-10 years, under the same circumstances. I think most NOS tubes, are sonically superior, by a long shot, to Sovtek tubes.