Similar Best Sellers

Mesa/Boogie 6L6 STR 445 Power Tubes - Matched Duet

Matched 6L6 Power Tube Pair

Write your review

Item ID: MB6L6445D

Mesa/Boogie 6L6 STR 445 Power Tubes - Matched Duet

Available Soon!

More of this item is on the way from Mesa/Boogie. Order today to reserve yours now, and we'll ship it as soon as it's available. Estimated May 2026.

Notify me when in stock

Tubes Are Not Returnable

Sorry, tubes cannot be returned, so please call if you'd like help choosing.

Fillmore 50 Re-tube Kit

$221 and 00 cents

Mark VII Re-tube Kit

$312 and 00 cents

Ask An Expert

Our expertly trained Sales Engineers are ready to help!

(800) 222-4700

What is a Sales Engineer?

Have one to sell?
Check out Sweetwater's Gear Exchange!
Learn More

Complete Your Order

Mesa/Boogie 6L6 STR 445 Power Tubes - Matched Duet

$91.00

Mesa/Boogie 12AX7 Preamp Tube

$26.00

Buy all:

Mesa/Boogie 6L6 STR 445 Power Tubes - Matched Duet

Available Soon! – Notify me

Add to list

Most Popular Accessories & Related Items

Q: What kind of sound can I expect from the Mesa/Boogie 6L6 STR 445 power tubes?

These Mesa/Boogie 6L6 STR 445 power tubes deliver a powerful, articulate tone with ample headroom and a strong, tight low end. They offer a balanced midrange and clear, sparkling highs, making them excellent for players seeking robust clean tones or a solid foundation for pedal-driven overdrive. Expect a dynamic response that brings out the best in your amplifier.

Need additional help?

Q: Why is it important that these Mesa/Boogie 6L6 STR 445 tubes are a "matched duet"?

A matched duet ensures that both tubes operate with similar electrical characteristics, which is crucial for optimal performance in your amplifier's power section. This matching helps maintain consistent tone, balanced output, and extends the lifespan of your tubes and amp. It also reduces the risk of uneven wear and potential damage.

Need additional help?

Q: Who are the Mesa/Boogie 6L6 STR 445 power tubes best suited for?

These tubes are ideal for guitarists who demand high-headroom clean tones, powerful low-end response, and a clear, articulate sound. They excel in genres like country, jazz, blues, and rock where a strong, defined tone is essential. Their robust construction also makes them a reliable choice for gigging musicians.

Need additional help?

Q: Do I need to bias my amplifier when installing new Mesa/Boogie 6L6 STR 445 power tubes?

Yes, it's generally recommended to have your amplifier biased by a qualified technician when installing new power tubes, especially if you're switching brands or types. Proper biasing ensures the tubes operate efficiently and safely, maximizing their lifespan and your amp's performance. Sweetwater's Sales Engineers can offer advice on this process.

Need additional help?

Back to navigation

This article was Written By

Our Product Research Team

Get to know them!

Put Mesa/Boogie Quality in Your Amp's Power Section

With their tightly articulate low-end response, balanced mids, and bright-yet-smooth top end, it's no wonder that you'll find Mesa/Boogie 6L6 STR 445 Power Tubes driving their modern Dual Rectifier and Triple Rectifier tube amplifier heads. This matched pair of tubes can also be used as an update for older Rectifier heads, or as a sonic upgrade for any 6L6-driven tube amplifier.

Note: Guitar amplifier tubes are non-returnable — contact your Sweetwater Sales Engineer for more information.

Mesa/Boogie 6L6 STR 445 Power Tubes Matched Duet Features:

The same premium power amp tubes found in Mesa/Boogie's modern Dual and Triple Rectifier tube amplifiers
Tight, defined bass; well-balanced mids; and bright-yet-smooth top end
Factory matched for the best possible performance

Resources

Guitar Amp Buying Guide

Back to navigation

Tech Specs

Type: Power
Model: 6L6 STR-445
Quantity: Duet
Manufacturer Part Number: 750640D

What Makes Our Sales Engineers Great?

Sweetwater Sales Engineers are a world-class team of experts dedicated to you. Hand selected from across the globe, each brings a wealth of experience and expertise in the world of music gear to provide you with unparalleled service completely free of charge. Friendly relationships, real trust, and the right gear are only a call or a click away!

(800) 222-4700

Contact Your Sales Engineer

Back to navigation

Customer Reviews

Be the first to review this product.

Write your review

It's hard to imagine a more quintessentially modern guitar amplifier than a Mesa/Boogie, and when Sweetwater guitarists want high-gain tone, Mesa is where they start. One thing we love about these amps is their sheer versatility, such as the massive range of tone you get from each channel, the freedom to use the tubes you love, onboard CabClone cabinet emulation, and MIDI control. And it's not just guitar amps - Mesa/Boogie's bass amps and pedals are equally cool. What's more, thanks to our incredibly close relationship with Mesa, you can even customize your own amp right here on Sweetwater's website! Get the sound and style you want from your next amp, with a Mesa/Boogie from Sweetwater.

See also: Amp Tubes, Mesa/Boogie, Mesa/Boogie Guitar Amp Tubes