Available Now at Northeast Music Center!

MESA/Boogie Replacement Tube Set for Mark Five: 25

Restore the speed, clarity, harmonic detail, and unmistakable Mark Series response of your MESA/Boogie Mark Five: 25 with a complete replacement tube set. Featuring two MESA EL84 power tubes and six MESA 12AX7 preamp tubes, this complete retube package matches the factory tube complement of the Mark Five: 25 and gives this remarkably powerful compact amplifier the foundation it needs to perform at its best.
The MESA/Boogie Mark Five: 25 takes some of the most celebrated sounds in MESA history and places them inside an exceptionally compact EL84-powered amplifier.
Clean.
Fat.
Crunch.
Mark IIC+™.
Mark IV™.
Extreme.
Six distinct modes, two independent channels, the legendary MESA 5-band graphic EQ, Multi-Watt™ power, reverb, an effects loop, and CabClone™ make the Mark Five: 25 far more than simply a small amplifier.
Available from Northeast Music Center, this complete replacement tube package provides the correct power and preamp tube complement for maintaining the performance of your Mark Five: 25.

COMPLETE REPLACEMENT TUBE SET

• 2 × MESA EL84 Power Tubes
• 6 × MESA 12AX7 Preamp Tubes
• 8 tubes total
• Correct factory tube complement for the MESA/Boogie Mark Five: 25
• No rectifier tubes required
• Compatible with Mark Five: 25 Head and 1x10 Combo configurations

TWO MESA EL84 POWER TUBES

The Mark Five: 25 power section uses:
2 × MESA EL84 power tubes
The EL84 power section is a major part of what gives the Mark Five: 25 its personality.
MESA describes the EL84 version of the Mark Series voice as tighter and brighter, with a fast top-end response and a power section that can be driven more readily than its larger 6L6-powered relatives.
These tubes contribute to the amplifier's:
Fast attack
Focused midrange
Harmonic complexity
Responsive power-tube overdrive
Excellent articulation
and:
Dynamic playing feel
Fresh EL84s can help restore the punch, immediacy, and responsiveness that make the Mark Five: 25 such an engaging amplifier.

SIX MESA 12AX7 PREAMP TUBES

The Mark Five: 25 uses:
6 × MESA 12AX7 preamp tubes
That's an important distinction from several other compact MESA amplifiers.
The Mark Five: 25 has an extremely sophisticated preamp architecture designed to recreate some of the most important voices in MESA history.
Healthy preamp tubes help maintain:
Gain structure
Clarity
Low-noise performance
Channel definition
Harmonic detail
Sustain
and:
The articulation required for high-gain Mark Series tones
When you're dealing with an amplifier capable of moving from pristine cleans to Mark IIC+ and Extreme levels of gain, the condition of those preamp tubes matters.

10 OR 25 WATTS — TWO DIFFERENT FEELS

The Mark Five: 25 features MESA's channel-assignable Multi-Watt™ power section with:
10 Watts
or:
25 Watts
The 25-watt setting operates the EL84 pair in MESA's Dyna-Watt™ Class A/B Pentode configuration for maximum punch, headroom, and clarity.
Switch to 10 watts and the same two EL84s operate in a Class A/B Triode configuration, creating a different feel with increased power-section clip-ability.
This isn't simply about making the amplifier quieter.
It's about changing the way the power section responds.
Fresh, healthy EL84s are essential to getting the most from both settings.

CLEAN — MORE THAN A HIGH-GAIN AMP

The Mark Five: 25 may carry some legendary high-gain circuitry, but its clean capabilities shouldn't be overlooked.
Channel 1 begins with:
CLEAN
A fresh tube complement helps maintain the clarity, attack, openness, and dynamic range required for this mode to deliver its best performance.

FAT — BIGGER & WARMER

Switch Channel 1 to:
FAT
and the response becomes fuller and rounder.
This is an excellent choice when you want a more substantial clean foundation or a warmer response that works beautifully with single-coil and humbucking guitars alike.
Healthy tubes help preserve the harmonic detail that makes the difference between simply sounding clean and sounding alive.

CRUNCH — ONE OF THE SECRET WEAPONS

Then there's:
CRUNCH
This mode gives Channel 1 an entirely different personality.
From pushed rhythm sounds through substantial overdrive, Crunch dramatically expands the Mark Five: 25 beyond its clean and high-gain extremes.
For many players, this is one of the amplifier's most useful voices.

MARK IIC+™ — A LEGEND IN COMPACT FORM

Channel 2 begins with:
MARK IIC+™
The original Mark IIC+ became one of the most coveted amplifiers in MESA history.
Its combination of fast attack, tight low end, articulate gain, and singing sustain established a sound that continues to influence modern guitar amplification.
The Mark Five: 25 brings that lineage into a compact EL84-powered platform.
This is exactly where healthy preamp tubes become especially important.
High gain magnifies everything.
Noise.
Microphonics.
Weakness.
Loss of definition.
A strong set of 12AX7s helps maintain the precision and articulation this mode demands.

MARK IV™ — WARM, BALANCED & MUSICAL

Next comes:
MARK IV™
This mode brings another legendary chapter of MESA history into the Mark Five: 25.
Compared with the more forward character of the IIC+ mode, Mark IV mode can offer a warmer, fuller, more balanced personality with an exceptionally musical playing feel.
It can cover an enormous range of gain.

EXTREME — MAXIMUM AUTHORITY

Finally:
EXTREME
This is the Mark Five: 25 at its most aggressive.
Fast.
Forward.
Harmonically intense.
Responsive.
And capable of tremendous high-gain articulation.
MESA specifically designed this voice for players looking for additional attack and aggression.
Fresh EL84 power tubes and healthy 12AX7 preamp tubes help ensure all that gain remains controlled and articulate instead of becoming soft or undefined.

THE FIVE-BAND GRAPHIC EQ

No discussion of a serious Mark Series amplifier is complete without the:
MESA 5-Band Graphic EQ
The familiar frequency centers give players tremendous control over the amplifier's final response and allow everything from subtle shaping to the famous Mark Series "V" curve.
It's one of the defining tools in the MESA vocabulary.
But EQ works best when the amplifier feeding it is healthy.
A fresh tube complement gives you a strong foundation before you begin shaping the final sound.

SILICON-DIODE RECTIFICATION

Unlike the larger 90-watt Mark V, the Mark Five: 25 does not use a tube rectifier.
Its rectification is:
Silicon Diode
Therefore, a complete Mark Five: 25 replacement tube package requires:
2 × EL84
6 × 12AX7
and:
No rectifier tube.
This is an important distinction when creating a complete replacement package for the amplifier.

MAINTENANCE-FREE FIXED BIAS

The Mark Five: 25 features MESA's:
Maintenance-Free Fixed Bias
design.
There is no alternate power-tube bias switch on this model.
The amplifier is designed specifically around its EL84 power section, making the correct MESA EL84 matched pair the straightforward factory-style replacement choice.

WHY RETUBE A MARK FIVE: 25?

Tube wear often happens gradually.
You may begin noticing:
Reduced punch
Less clean headroom
Softer attack
Increased noise
Microphonic behavior
Reduced high-gain definition
Less sustain
or:
An overall loss of responsiveness
Because the changes occur slowly, it's easy to become accustomed to an amplifier that isn't performing the way it once did.
A complete retube can help restore the performance and confidence you expect from your MESA.

PERFECT FOR PREVENTIVE MAINTENANCE

A complete replacement set isn't only for an amplifier experiencing problems.
It's also valuable preventive maintenance.
For working musicians, studios, churches, touring players, and serious MESA owners, having the correct replacement tubes available can prevent unnecessary downtime.
At Northeast Music Center, we believe that's especially worthwhile with an amplifier as capable and versatile as the Mark Five: 25.

A SMALL MESA WITH SERIOUS HISTORY INSIDE

The Mark Five: 25 may be compact, but its heritage certainly isn't.
Inside are voices inspired by some of the most important amplifiers MESA has ever built.
Clean.
Fat.
Crunch.
Mark IIC+.
Mark IV.
Extreme.
All powered by an expressive pair of EL84s and shaped by a sophisticated six-tube preamp.
At Northeast Music Center, we're proud to support players who want to keep these remarkable amplifiers performing at their best.
The goal of a complete replacement tube set is simple:
Preserve the tone. Restore the response. Keep your Mark Five: 25 performing like a MESA should.

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.