Another thumbs up for the Sophia Electric EL34's, with exceptions. I believe these are Chinese made and as such I have had tube failures using them. But, I purchased them on Sophia's Ebay store and was offered a 2 year warranty for $60 so I did, and am glad I did, since most tubes are only warranted for a month. Reliability issues aside the Sophia's are better than any EL34 new stock, I have heard, (JJ, Winged C, Tung Sol, etc.) and excels in clarity, bass, dynamics, detail etc. They are much more expensive, but, hopefully worth it, even with reliability problems.