2. misc-audio
  3. 1061937917

Tube ---- Ei 12ax7

Does anyone have experience with these tubes?

I have a Jolida JD-100 and experimenting with tubes. I think I want to try these tubes next, but before I plunk down my cash for these bottles I thought I might ask for experiences or opinions.

So far I have tried.....

EH 12ax7
Vintage RCA 5751 triple mica black plates
JAN GE 5751 grey plates

Its somewhat of a tossup right now between the RCA 5751s and the EH 12ax7s.

The RCAs give great bass (for a tube) and smooth dynamic sound with good seperation.

The EH 12ax7s give awesome mids/vocals with a soundstage that goes to the neighbors house, but they are a little bass light.

Any and all inputs are kindly appreciated.
distortion
zaikesman
3,017 posts
 
Just a note, Distortion: As far as I know, all the EI 12AX7's will be the same "model" as one another. The 'Low Noise' designation will simply mean that the particular ones you bought have been pretested and culled by the reseller to represent something like the best 10% or 5% of the tube crop tested (along with being priced higher), while the remainder are sold for less without the 'LN' tag.
trelja
3,226 posts
 
Zaikesman, hello. Have you had the opportunity to give the Ei KT90s a listen in your amplifier? If you, we are curious to your impressions. Take care, Joe
zaikesman
3,017 posts
 
Joe, this unfortunately didn't work out from a technical standpoint. I'll be updating the original thread.
trelja
3,226 posts
 
OK, we'll all be waiting to hear about it, Zaikesman.
pubul57
3,712 posts
 
Since some of you may still be using this tube, I'll mention that Ram Labs carries them, the pre-war Yugos and as usual very well tested for noise, section matches, etc. I use them in my Music Reference RM10 without a glitch, in that application I just use the standard grade, quiet enough in an amp driver stage, but he also has them suitable for phonostages.
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