12AX7LS: ‘Deadly quiet, extremely dark but not in a soupy muddled way’

Feedback received from Paul via email:

“Hi Rachel,
I just want to give you an update. The tube(s) are doing well. No issues seen and I have about 10 hours on them so far.
I gotta say “wow!” these are deadly quiet, extremely dark but not in a soupy muddled way, they are still very dynamic but the silence is incredible. I am really enjoying these so far and I am sure that they will continue to develop.”



“The 12AX7LS are the best I’ve heard in my system for phono”

Feedback received from Steven D. via email:

“Hi Rachel,

Initial impressions on the Treasure 12ax7-LS in the critical phono preamp application are positive (George Wright’s WPP200C, 2 x 12ax7 per channel, 60db gain MC). Replacing the Psvane T-IIs, I find the sound is more articulate / better organized / more coherent / less homogenized. Appears as if the noise floor has been lowered, better low level info retrieval. Better bass, too.

12AX7LS – “Overall, amazing, musical, without sounding louder”

Feedback received via email:

“Hi Rachel,

I received the 12AX7LS super tubes and their performance is super!

Put the new tubes in and turn on, first 10 mins, comparing to Psvane 12AX7-TII…the new super tube has lower noise floor, sound is more dense and transparent, bass is deeper and better bass layering. Sound is richer and much more transparent.

Black Treasure 12AX7-LS: “They are absolutely great”

treasure 12AX7LXFeedback received from Peter in Germany via email:

“These tubes really needs time (120+hr) to grow.  Now, they are absolutely great. The best i’ve ever heard before, period……I’m very happy too with the big sound of the LS-type in my big amp. Even after 72 hours they sounds good, but now, after 120+hours, I’m in heaven. Tonality, detail (!!!) and room are just great. An absolute notably improvement to the Psvane 12AX7. The warm, precise, detailed and big sound fit perfect to my preference.