2. amps-preamps
  3. 1247035351

Groove Tubes EL34LS vs SED

i have a amp air tight ATM-3 to be precise that currently uses Siemens EL34. I want a bit more dynamics especially at the bass. Has anyone tried these? The Siemens seem at the end of their life, although they test fine in a tube tester, the bias cant be adjusted sufficiently high. Since I got this amp recently (used) I dont know if the lack of bottom end is due to old tubes, or just the amp itself.Advice appreciated THX
whodiini
opus88
530 posts
 
Sorry. I overlooked the fact that you DO have a tube tester.
gmuffley
132 posts
 
I use the Tesla El-34LS in my Quicksilver M-135 monoblocks. They give the greatest "slam" in the low and mid-bass of any of the tubes I have tried (but I have never tried the Siemens).
whodiini OP
6 posts
 
to Gmuffley - are the groove tubes el-34ls teslas? how is the high end? The Siemens high end is fine, but not the "slam".Have u compared with the SED? I'm about to buy new sets and its between the groove tubes and sed. Based on this feedback, i may go for the groove tubes. BTW, i am running Brimar 13D5 and Sovtek 12AX7LPS NOS circa 2003. cables are the new Oval 9s. THX everyone!
opus88
530 posts
 
Whodiini...Aside from the original TeslaE34Ls I also have JJ Tesla E34Ls which, to my ears, sound extremely good too. You might want to check out the BOI AudioWorks site.
opus88
530 posts
 
By the way, For what it's worth, I have tried the Brimar 13D5s with my Air Tights. Though they present a very nice sound, I found them somewhat light in the bass (the area you are concerned with). I strongly recommend you try those Mullard "boxplates" in the 12au7 sockets. You might be pleasantly surprised.
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