The Svetlana 6L6GC tube has a nice balanced sound that is not as bottom heavy as say the TAD and not as bright as the SED. The midrange response is very nice. No honk and no really pronounced EQ shelving as you manipulate the tone controls of the amp. Very smooth and balanced frequency response that sounds great driving Celestion speakers which tend to be a bit honky in the mids and extreme in the Bass and Treble. Clean sounds are pretty chimey and overdrive is thick with lots of sustain.