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

"The GL KT88 was not as good in my setup." Interesting.
I remember the 88's as dynamic in PL systems, but everyone  has different situations.

I had the 77's in my HP for a bit. Great tube. I'v kept the old RCA 6L6G's   cookin in mine for a few years now. 

I may step up and try the might 150's this year, just for audio kicks.
8@$100 each, is kind of a downer though. I've been expense free with audio nonsense for awhile.

Opening the wallet, I hear the old Foreigner song-"Feels like the first time!"

@artemus_5 

I play drums and love the Russian Tung Sol 7851a,,.however I recently installed a quad of JJ EL34L and prefer them. They have that great midrange magic, tight punchy bass and smooth highs. The JJ's are my favorite new production power tube. They are even cheaper than the 7851a. They beat the Russian GL KT77, Mullard EL34 and Tungsol EL34B in my amp. The JJ's are a very underrated tube.

Hi Just saw your post rel the 7581A. I bought a pair for my Dennis Had HO Inspire "Hot Rod" amp and really love them. I bought the amp used, it came with KT66s.

I bought the 7581 from Tung Sol and really love them, great sound - much warmer than the KT66 IMO. I also bought NOS RCA 6F6G Power Pentodes and have landed here. 

I tried the KT66, 7581, KT120 but really love the 6F6G and haven't gone back. They don't put out as much power (it seems that way) but I have high efficiency speakers and they play plenty loud for me i.e. the preamp volume control is always at 9:00 position, so the 6F6G has plenty of power for me your results may vary but I really do like the 7581A tubes - can't go wrong with them, just my 2 cents

What do the 6F6G do that the TS 7581A does not do? 

artemus_5485 posts

Latino ST-70. I’m thinking about also trying a inexpensive EL-34 (EH) so I can experience the supposed magic.

I've heard EL34 that brought magic to the room, I've heard EL34 that made me leave the room. Don't get too cheap. You'll hear some of the worst bass and highs you ever heard. On the other hand, 6L6 like the RCAs, GOOD vintage GE are the benchmark of quality BASS and mids,
little lacking on the top, but what a GEM. Before I ever Roll power tubes, I  always check them.. I prefer to change the signature, with the signal tubes. FIRST. RCAs, Telies, Amprex or Volvos, Solvex then Mullards, everything after that may sound good, but be aware. Cheap valves can really tear up a great amp or speakers..

KT 90s are a great sounding valves, (very close to a 6550 / kt88 hybrid sound) Very clinical. I like them MUCH better than the 120 or 150s. Second they hold up forever.. Almost.

Regards