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Sophia EL34-ST Tubes

Does anyone have experience using Sophia EL34-ST tubes? Currently I'm using GL KT77 tubes in my Primaluna integrated amp. I tried other EL34 tubes along with KT88 and KT120 tubes but feel the KT77 have the smoothest mid-range especially with female vocals without sounding harsh. Supposedly the Sophia tubes have a 300B type sound from one review. Any opinions?
ronrags
cellcbern's avatar
cellcbern
61 posts
 
In my Unison S6 they are a huge improvement over the Tung Sol EL34's that came with the amp.  Timbre, tonal and image density, soundstage - all improved over the stock tubes.  
lancelock
1,102 posts
 
I agree with @cellcbern , they sound better than any other new production tube in my LTA ZOTL40 and I even prefer them over my NOS Mullard EL34 FX2. I have never owned a 300B amp so can’t compare but these tubes are the real deal.
jmolsberg's avatar
jmolsberg
467 posts
 
any issues with the Sophia EL-34 and reliability?
lilmsmaggie
273 posts
 
I've had Sophia mesh plate 300B's and they were fantastic. 
No experience with the EL-34's though.
a25105
133 posts
 
I would like to know how it compares to the KT-150 on a Primaluna too:)
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