Opinions Please - New Prodduction Sophia EL34ST Coke Bottle


If you use these tubes, have used these tubes or have had the opportunity to hear these tubes, I would be interested in what attributes you think this tube posses with respect to sound stage / image, bass control, hi and low extension, balance, tone, dynamics, etc; maybe in comparison to other EL34 types. Please also note the amp in use and tubes in use (brand, opposed to stock tubes) prior to use of the Sophia EL34. Please advise of any tube you have compared to the Sophia and liked better or didn't like as much and reasoning.
Thank You
Brad
128x128bradf
jond

Your observations of the Psvane EL34 Phillips Holland replica, and KT77 comparisons to the other tubes you reference is helpful. Thanks for the input.
Brad
  
I've used the PSvane black bottles for about 2 years. 3 tube failures out of 8 in a CJ amplifier. I've used lots of el34's for the past 20 years I've owned that amp and the new gold lions are pretty good and essentially about the same cost as a set of vintage winged C's. 

For my musical tastes & equipment, the PSvane sounded the best but the amp is used as a midrange amplifier only. Twice the tubes caused other amplifier damage when they went but only about $150 each time for repair costs. But if you add that cost into the original purchase price you are talking about a lot especially when you want matched pairs. So you have purchase price plus replacement cost plus repair cost.

Had same problems with my son's Audio Research tube amp used for mids with Shuguang Black Treasures. 1 in 4 failed and took down parts as usually the case with audio research tube failures. Once again, they did sound the best when working. 

The trouble is nobody stands behind tube reliability especially if you are looking at getting 3 years or so out of them. My friend says the tube manufacturers should all stand behind their "great midrange" claims with a 1 year unconditional money back guarantee.

How nice would that be?

That would help the reliability issue quite a bit & would sure help us tube amplifier owners when it's time to re-tube.
@jond 
@zadfrak 

Thanks zadfrak for your contributions.
Although it doesn't really address the SophiaEL34, I included a link (listed below) that provided you have not previously seen it; you may find interesting/helpful

http://wallofsound.ca/audioreviews/tubes/el34-tube-comparison-with-tubes-supplied-by-www-thetubestor...
bradf I've read that review before and it totally concurs with my own experiences. Guessing that the Sophia is just so new very few people have had a chance to audition it hence the dearth of responses or reviews.
One tube seller who DOES stand behind his tubes more than others is Roger Modjeski of Ram Tube Works (and Music Reference).