Mesa/Boogie 5881 6L6 STR425 Duet Power Tubes

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Mesa/Boogie 5881 6L6 STR425 Duet Power Tubes, Matched Pair, Matched Pair Mesa/Boogie 5881 6L6 STR425 Duet Power Tubes, Matched Pair, Action Position Back
zZounds Gear Experts Say...
When you require all the power and rich saturation of premium 6L6 valves, then you'll need to feed your amp this duet of military-spec Mesa power tubes.

The Mesa 5881 STR 425 is a military grade 6L6 designed with an emphasis on rugged durability and the capability to handle higher voltage requirements. It produces a full bass and rich midrange with tapered highs that lends itself well to styles of jazz, fusion and traditional roots and blues music... or any style where tapered high frequencies and greater longevity and reliability is desired. The STR 425 is also commonly used in older Mesa all-Tube Bass Amps using 6L6s like the Mesa D-180, Bass 400 and Bass 400+ models.

- Substitute in: Any 6L6 loaded MESA amp

Dimensions and Weight in Packaging

Matched Pair

  • Shipping Weight: 0.32 lbs
  • Shipping Dimensions: 7 x 5 x 3 in
  • Manufacturer Part Number (MPN): 750881D

Open Box (Like New), Matched Pair

  • Shipping Weight: 0.32 lbs
  • Shipping Dimensions: 7 x 5 x 3 in
  • Manufacturer Part Number (MPN): 750881D

For support or warranty questions, please contact the manufacturer:
Phone: 707-789-3348, 1-800-4GIBSON
Email: service@gibson.com
Web: https://www.mesaboogie.com/support/

Reviewers gave this product an overall rating of 5 out of 5 stars. (2 ratings)
Submitted April 23, 2026 by Patrick Huey in Nacogdoches, TX

"5881 again"

Overall: 5 out of 5 stars
(see rating details)
Verified Purchaser zZounds has verified that this reviewer purchased this specific product from us.
Great tubes so far but poor shipping AGAIN after I returned the first pair because they arrived in a paper bag…. I was promised by several folks at zZounds if I were to return them for exchange, places would not be shipped in a paper bag/envelope which of course would these being glass is not a fantastic idea
Sound
Good sound well matched
Features
Close tight match
Ease of Use
Easy if they actually arrive in one piece unbroken from zZounds sending them in a sack
Value
Well worth it if Zzounds would actually pack them properly

Musical Background:

Played since high school

Musical Style:

Rock metal country thrash blues
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Matched Pair

$99.00
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