Anyone have experience with the Tung Sol 7581a vs. EL34, KT66, KT88, 6L6


I broke down and added another power tube (Tung Sol 7581a) to my collection.  That can get expensive as my Primaluna Dialogue HP Premium integrated has 8 power tubes.   

Why has this tube escaped me thus far?  Why is it not more popular?   Many folks don't sell this reissue tube.  

I think this is a great deal.  I was torn between the lush, thick midrange of the EL34 and the more evenly spread out sound of the KT88.  But the KT88, for all its more correct behavior didn't romance me like an EL34.  

The 7581a from Tung Sol can be had cheap and I really like them.  [I'll spare you all the audiophile terms].  They check the boxes that I was looking for. 

Does anyone have experience, information or knowledge about this splendid tube?  

PS  The next experiment is KT150s but I can't see doing it if I'm gonna lose any of that great EL34 midrange. 
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Showing 3 responses by oddiofyl

I did not have good life on a matched quad of Tung Sol 6L6 G big bottle tubes.   They sounded really good and looked cool , but they started to drift and one died after only a few months.   Gold Lion KT66 is a rugged sweet sounding 6l6 variennt
Zkidd, thanks for posting.... I have a pair of Mid Monos and love them, they are awesome amps. I have had several tubes and my favorites have been KT66 and KT88 Gold Lion but I have not really had long life with them.... I had a pair of KT66 that one shorted , big fire in the bottle and it took out my midrange on my speaker..... honestly would rather that happen than amp damage..... easy fix on a Klipsch.

So in a pinch I bought a quad of Apex matched JJ EL34 locally and they actually sound quite good but I like everything I have been hearing about 7581a tubes and think I am going to order a quad.
Speaking the modern EL34 Mullards , i only got 6 months before one died.....pretty disappointing.   I think the green label EH 34s sound better and are tough....  anyway hope the 7581a possess the goodness of EL34 and 6L6 types in one bottle!!!