5881WXT  Sovtek Power Pentode.

Also known as a 6L6WGC

The Sovtek 5881wxt power tube delivers some of the sweetest tones of the 6l6/5881 range. 

The 5881 from Sotek has a warm, round tone that is known to bring tube amps to life whether they be a vintage amp or a modern amp.


Built to a standard reserved for the Military, these 5881 tubes will tolerate a higher voltage than a 6L6. Often used as an OEM tube for Marshalls, Soldano, Solo etc these tubes are renowned for delivering the tone that guitarists want and expect from their tubes. The 5881 from Sovtek have been used to replace the 7027 "often found in vintage amps" with great results. A favourite amongst the guitar community and definitely a favourite amongst technicians.

Sovtek are very consistent with the build quality of their tubes and the 5881 range are an extremely reliable tube. 

Note:  The Sovtek 5881wxt has a heater voltage of 6.3 volts at 0.88 amperes. Maximum plate current is 73 mA. The 5881 has a transconductance rating of 6000 micromhos and a maximum output power of 5.8 watts.

FAQ: Can I swap 5881 for 6L6 in my amp and vice versa.

Well, yes and no.. it really depends. Some amps are designed to handle both and have a switch on them but in short, you can put 6L6 tubes into a 5881 designed amp but not necessarily the other way around. The 6L6 tube is essentially a 30watt tube whilst the 5881 is only 23watts so putting a 30watt tube into a 23watt amp is ok but you shouldn't really put a 23watt tube into a 30watt amp.

Available in

  • Singles
  • Matched Pairs
  • Matched Quads
SKU 5881wxts
Brand Sovtek
Unit Of Measure ea

Reliability, Stability and Tone

12 March 2019
It’s a few weeks in since my purchase of 3 sets of matched quad Sovtek 5881s for my Mesa Boogie Bass 400+ head. True to the marketing, it was a simple matter of pulling the old tubes and sticking in the new. Evatco provided 12 tubes that were matched. And now my amp feels fresh with that fat, tight bottom end restored with glassy highs and a grunty midrange. Always great when retailers deliver on their promises quickly and flawlessly. Always great when a renowned manufacturer continues to deliver a quality product. Great tubes!

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