Sovtek 12AX7LPS


Availability: In stock

Quick Overview

High gain, low noise, smooth sound. Great as a phase inverter. ****LIMIT 1**** (same as Mullard reissue 12AX7.)

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Sovtek 12AX7 LPS

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  • Sovtek 12AX7 LPS


The Sovtek 12AX7LPS is a long plated spiral filament dual triode. High gain, and low noise, is nicely balanced all around - not bright. Players with combo amps or those who like to play on max volume may want to reconsider, as the 12AX7LPS can be prone to microphonics (due to the long plate). The Sovtek 12AX7LPS is the same tube as the Groove Tubes 12AX7R2. The long plate makes it great in the phase inverter spot, a position which can impact the overall feel of your amp. Avoid these in high voltage cathode follower(CF) spots, these cannot withstand prolonged high voltage. They also don't appear to light up because of the spiral filaments, please listen to your amp before emailing us about a DOA tube!



Sovtek LPS 12AX7 Data Sheet

Customer Reviews

Great Tube! Review by David S.
I've been using the Sovtek LPS for years now as a phase inverter, and also it works great in V1 of amp heads. This is especially true for older amplifiers like a Series III Carvin X-100b. These amps have AC filament power supplies, which can cause hum on many tubes. The LPS has a spiral filament, which eliminates the hum from AC Filaments, so my X-100b is nice and quiet, as well as sounding great! (Posted on 6/27/17)
Ditto Review by Tim VA
Boy, the output of my amp is significantly different, AND BETTER, with the Sovtek LPS in the v5 position of my Egnater Rebel 30. You also recommended the Tung Sol in the V1, and the combination of these two with the Ruby HG in v2-v4 is absolutely phenomenal.

Thank you so much for you excellent advise. If you are looking at this site, take Doug's advice, it will make a huge difference. (Posted on 4/20/17)
Tungsten Crema Wheat retube LPS PI Review by Dan
For my ears, I have never played, heard (or felt) a better sounding amplifier! The tone is now huge and buttery smooth. What low end! These new tubes in the Crema Wheat are incredible, particularly the NOS 6V6’s. What a difference the right combination makes! Thanks for your help. I’ll be back!

Dan (Posted on 4/3/14)
Fender Hot Rod Deluxe retube(Tung-Sol 6L6GC-STR, TS 12AX7, Ruby 7025SS HG, Sovtek LPS) Review by Chuck
I just wanted to say that I have the tubes installed and it was a
phenomenal difference in sound.
Thanks for suggestions, now I want to experiment!

Chuck (Posted on 6/12/13)
Traynor YBA-1 preamp(V1-Ruby AC7HG+, V2-Ruby 7025SSHG, V3-Sovtek LPS) Review by James
Finaly got the new tubes in the amp... HOLY CRAP!!!! It's like a new amp - really. Loads of low end and all the bark and gonk I guy could want. Just great!

Thanks for the help Doug, I'll be buying from you again.

James Pertusi
Owner/Engineer, The Kennel Recording Studio (Posted on 1/17/13)

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