Sovtek / ECC83/12AX7LPS-SOVTEK

ECC83/12AX7LPS-SOVTEK Click on image(s) above to view larger
Select Test Options
  • Factory Tested
  • Balanced (Matched)

All prices contained on this page are exclusive of VAT. This is currently charged at 20% and is payable by all EU countries.

A test report is available click here to view

The Sovtek Corporation produces a range of the most popular audio and guitar valves. These valves are made in Russia to high standards at the reflector plant. These valves are used by original equipment manufactures the world over for their sound quality and reliability.
12AX7LPS is Sovtek long plate with a spiral filament which allows use with AC connected Heaters. This valve is a medium to high gain double triode with long structure anode plates. Warm detailed and well balanced sound this valve has become very popular in audio amplifiers. It has also proved a good choice in guitar amplifiers running clean and reverb driver positions.

The balanced item has matched triode sections for use in critical positions in tube compressors and audio amplifiers. If you want a matched pair then by ordering 2 of the balanced valves you will get a matched pair

Guitar Amplifiers
I would not use these in guitar combos or high gain stages this is because the long plate structure it is susceptible to the vibration and excessive microphonics. I would only use these in guitar heads with vintage voiced pre amp sections such as old Marshall Superlead heads.

For combos and High gain amps the 12AX7WC Sovtek is a better choice and will last longer. So we do not recommend the use of the 12AX7LPS in these applications

We offer two options:

1) Factory tested
2) Balanced -matched triode sections for Phase splitter, Audio & Tube microphones

All Balanced preamp valves are Dynamically Drive tested under real working condition and are matched on dB gain. They also have passed the following tests:

Gain (db) Drive Tested
Transconductance (gm) Drive Tested
Output Drive Tested
Noise 1 (signal to noise)
Noise 2 (Aural)
Microphonics Test 1(Ambient)
Microphonic Test 2 (Shock)
Cathode Test
Grid Leakage Test



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