Available Now at Northeast Music Center!

MESA/Boogie Replacement Tube Set for Express Plus 5:25

Bring your MESA/Boogie Express Plus 5:25 back to full strength with a complete replacement tube set built around the amplifier’s original tube complement. This set includes four MESA EL84 power tubes and five MESA 12AX7 preamp tubes, giving you the correct full retube configuration for the Express Plus 5:25.

The MESA/Boogie Express Plus 5:25 is one of MESA’s most versatile compact tube amplifiers, combining multiple voicings, Multi-Watt™ operation, graphic EQ, reverb, and a highly responsive EL84 power section.

Like any all-tube amplifier, its performance depends heavily on the condition of the tubes inside it.

Over time, worn tubes can lead to:

Reduced punch.

Less clarity.

More noise.

Weaker low-end response.

Loss of gain and harmonic detail.

And inconsistent overall performance.

Available from Northeast Music Center, this complete replacement set gives Express Plus 5:25 owners a simple way to refresh the amplifier with the correct tube types.

COMPLETE REPLACEMENT TUBE SET

This set includes:

• 4 × MESA EL84 Power Tubes
• 5 × MESA 12AX7 Preamp Tubes

That matches the factory tube complement used in the MESA/Boogie Express Plus 5:25.

DESIGNED FOR THE EXPRESS PLUS 5:25

The Express Plus 5:25 uses:

4 × EL84 power tubes

and:

5 × 12AX7 preamp tubes.

Its Multi-Watt™ power section allows the amplifier to operate at:

5 Watts

15 Watts

or:

25 Watts.

Because the amplifier changes operating character across those power modes, healthy power tubes are especially important to preserving the feel and response the Express Plus platform is known for.

FOUR EL84 POWER TUBES

The power section of the Express Plus 5:25 is built around:

4 × MESA EL84 tubes.

EL84s are known for:

Fast response.

Chime.

Midrange presence.

Harmonic richness.

And a more immediate, compressed feel when pushed.

That character is a major part of what separates the 5:25 from the larger 5:50.

Fresh EL84s can help restore the amplifier’s:

Attack.

Clarity.

Punch.

Power-section response.

And the harmonic complexity that makes pushed EL84 amplifiers so engaging.

FIVE 12AX7 PREAMP TUBES

The Express Plus 5:25 also uses:

5 × MESA 12AX7 preamp tubes.

These tubes play a major role in:

Input gain.

Channel voicing.

Overdrive structure.

Effects-loop operation.

Phase-inverter duties.

And the overall response of the amplifier.

As preamp tubes age, players may begin to notice excess noise, reduced definition, microphonics, inconsistent gain, or a general loss of liveliness.

Replacing the full preamp complement can help restore the amplifier’s intended performance.

WHY RETUBE AN EXPRESS PLUS 5:25?

Tube wear often happens gradually.

That means a player may not realize how much tone and response has been lost until fresh tubes are installed.

A tired amplifier can begin to sound:

Duller.

Softer.

Noisier.

Less dynamic

Or more compressed than expected.

A complete retube can help restore much of the amplifier’s original feel.

FIXED-BIAS MESA DESIGN

The Express Plus 5:25 uses MESA’s:

Maintenance-Free Fixed Bias

design.

That means the amplifier is designed around properly selected MESA power tubes operating within the intended bias range.

For many players, this simplifies routine tube replacement compared with amplifiers that require manual rebiasing every time power tubes are changed.

RESTORE CLEAN HEADROOM

Although the Express Plus 5:25 is famous for its overdrive capability, its clean performance matters just as much.

Fresh EL84s can help restore:

Clean headroom.

Transient response.

Clarity.

And a stronger, more controlled low end.

That matters especially for players who rely on the amplifier’s cleaner voices or use pedals into a clean platform.

RESTORE CRUNCH, BLUES & BURN RESPONSE

The Express Plus platform includes a wide range of gain textures.

Healthy preamp and power tubes help preserve:

Definition.

Sustain.

Harmonic complexity.

Gain structure.

And the responsiveness that makes the amplifier feel connected to the player.

For players using the full range of the Express Plus, a complete retube is about restoring the entire amplifier—not simply replacing worn parts.

IDEAL FOR PREVENTIVE MAINTENANCE

A complete tube set is also useful as preventive maintenance.

You do not have to wait for a tube to fail before replacing it.

For working players, studios, churches, and musicians who depend on their amplifier regularly, having a fresh replacement set available can prevent unnecessary downtime.

At Northeast Music Center, we think that is particularly worthwhile for discontinued MESA models that players plan to keep in service for years to come.

KEEP A GREAT MESA WORKING

The Express Plus 5:25 may no longer be part of MESA’s current amplifier lineup, but it remains a highly capable and musical design.

Its combination of:

Multiple channel voices.

5 / 15 / 25-watt power switching.

Graphic EQ.

Reverb.

Effects loop.

And:

EL84 power.

still makes it a remarkably flexible amplifier.

A fresh tube set helps protect the performance of an amplifier worth keeping.

THE RIGHT TUBES FOR THE RIGHT MESA

For us at Northeast Music Center, tube replacement should be simple and accurate.

The goal is not to guess.

It is to install the tube complement the amplifier was actually designed around.

For the Express Plus 5:25, that means:

4 × MESA EL84

and:

5 × MESA 12AX7.

That is the correct full retube configuration.

Northeast Music Center is a full line Music retailer located in Northeast Pennsylvania- We are an Authorized Mesa Boogie Dealer and purchase these products direct from MESA HEADQUARTERS IN PETALUMA CALIFORNIA. We do not obtain our MESA AMPLIFIERS or other MESA products from "jobbers" or other dealers. Our MESA AMPLIFIERS AND CABINETS come to you in the factory boxes with factory packing material. We will, upon request, and also randomly, open the box prior to shipping to check that all contents are included and that no damage has been found in shipping from MESA to our Store location. Northeast Music Center does reserve the right to sell these products in our store to daily walk in customers. It is our goal to always have this product in stock and if for any reason we sell out, we will reorder immediately as long as this MESA AMPLIFIER is currently produced for resale by the company. We will order the amplifier in a ample quantity to fill your order. It is our goal to make your experience a good one; We invite you to ask any and all questions about this product.  Please do not purchase this item if you can not pay. This is a new Mesa with full 5 Year factory warranty to the Original Owner. 3 Year Warranty on Speakers.