modified jolida 100, mh cd-25, or audio aero prima

My vintage RCA 5751 black plates arrived yesterday I installed them ASAP, warmed it all up about 5 hours and had a listening session.

The BP5751's have more solid adn immediate bass, acceptable dynamics, they seem a little more reserved in the mids, but still quite nice. These are the most expensive Tubes I have, but....

I think I still prefer the incredible 3d soundstage the EH 12ax7eh's are throwing, even if I have to live without the SS like bass the 5751s give.

I have ordered a pair of EI ECC83 low noise 12ax7's, they should be in next week. I'll give an impression of them as well.

I am going to leave in the RCA 5751's for a while however, as they are pretty darn good.

Distortion, you are just reminding me that we all will hear different responses depending on strengths and weaknesses of team components, primarily speakers. Some speakers are noticeably bass heavy. Others might have a bright tweeter. My speakers are fairly civil, and sound best with a neutral tube.

When the Telefunkens were exchanged for my Sylvania 5751 tubes in the Llano, the transformation left all listeners speechless. That was with using Martin Logans.

The bass was tight, and musical, the mids clean, the highs sweet and fully articulate. Images were natural.

I enjoy the same response with my Jolida/Pass Labs/Apogee combo.

Since 5751 tubes are getting hard to impossible to find, and with the prices soaring, it would be great, if in your tube rolling, you find a good substitute.

Just for the experience maybe you should plug in some of the tubes I seem to be drawn to. You couldnt be more right about the system components and the tubes synergy.

Here is a link to a spot were you can buy them The Tube Store.

They(EH 12ax7eh's)are only $9.95 each, so what the hay.

The RCA 5751s are gonna stay in for while and then I will swap back. Sometimes I feel like I get acclimated to a certain sound and any change is perceived as bad.

I found ge 5 star 3 mica grey plates worked best for me. Mine is modified. I use rogue/nad/von schweikerts.

I thought I might revist this topic with a follow-up.

Just today, I recieved a pair of EI 12ax7ln tubes. Promptly inserted and listened for a while, after warmup of course. These are very nice tubes. I intend to let these stay in place a while.

After that I am gonna have a shootout of my three favorites, Vintage RCA 5751 Triple Mica Black Plates, Electro Harmonix 12ax7eh, and the Elektra Industrija 12ax7ln's.

This is so much fun. If I had known "tubing" was so much fun I would have been doing it a long time ago. Thanks everyone and especially 89lotus, the original poster, for letting your thread be hijacked so easily.