New 4x Sovtek 5881 / 6L6WGC / 6L6 | Matched Quad / Quartet / Four | Power Tubes | Free Ship

Brand New Sovtek 5881/6L6WGC Matched Quad (4 tubes)
The Sovtek 5881 delivers a warm, round tone that "sweetens" any vintage or modern guitar amp design. Chances are if an amp uses 6L6-style output tubes, it has Sovtek 5881's in its sockets. Built to rigid military standards, the 5881 will tolerate higher voltages than any other 6L6. Extremely consistent from piece to piece, the Sovtek 5881 is the most reliable current production 6L6 available.
Our Matching Policy
At Tonal Tubes we match tubes using a tester that enables us to match tubes at high plate voltages as well as various bias voltages. This means that when you install these tubes, they will be a tight match inside your amplifier.
We have very strict standards when it comes to matching. We match power tubes within 5% for plate current and 10% for transconductance. Most other retailers will match to just one of these values, however it is important to have both of these values matched. This is not a simple process and does take lots of time and dedication since tubes can vary so much from the factory.
Having matched power tubes is important because it reduces hum from your amplifier. It also allows you to get more life out of your tubes, since each tube will be working approximately the same amount.
***Both the plate current and transconductance will be written on each and every tube box. See the second picture for an example of what we mean.***
Why You Should Do Business With Us

• Every single tube is checked for shorts and leakage on a calibrated Eico 667 tube tester

• Comes with original packaging straight from the factory, as shown in the picture

• Very competitive prices

• Fast shipping

Shipping

• Tubes will be shipped with USPS First-Class Mail

• Most orders are shipped within 24 hours

• Tracking information is included for every purchase

Return Policy

• Customer satisfaction is our #1 priority. If you are not pleased with your purchase you may return your item for a refund up to 30 days after purchase.

About Us
We are musicians who crave an amazing tone. We all know that swapping out tubes can be one of the more effective ways of improving your tone.