Are MULLARD NOS EL34s and LTA ZOTL40 REF worth the price of admission?


I'm considering giving an older Linear Tube Audio (LTA) ZOTL40 Ref amp an audition.  LTA has a factory upgrade that includes upgrading to Mullard NOS EL34s for $800 (or less with additional discounts).  I am wondering if quad set of old-stock Mullard EL34s are worth the $800 price of admission?  I don't pretend to know what anyone else's budget is but $800 for quad EL34s seems like a lot.  If I'm paying the premium, it better be across the board and not just improvements on chamber music or obscure Chinese opera (no offense intended).  Does anyone have experience with either NOS Mullard tubes or LTA ZOTL40 Ref amp?  If so, please chime in.  Thanks.
128x128bananaslug
I can’t say how NOS Mullard el34’s will sound in an LTA amp but I assure that xf2 NOS Mullards (both single and double getters) and the unicorn xf1’s are so much better than anything made today that the difference wont be subtle. $800 for a NOS quad is actually pretty fair. i wouldnt sell my xf2’s for $800.
You should call Andy at Vintage Tube Services. He'll help you figure tube related things out.
True did you convince yourself.Thats the thing with tube swapping your trying to find Oz...or Heaven.But it gives you something to do.

Have you priced out what a matched quad of NOS would cost if you bought them separately?

What kind of warranty on tubes do you get from LTA?