Introduction
John Mayer has long been associated with Martin guitars, having played their instruments throughout his career. As one of the world’s most acclaimed contemporary guitarists, it was only fitting that Martin would develop a signature model designed to Mayer’s exact specifications.
The Martin OMJM John Mayer Signature acoustic-electric guitar began as a collaboration between the legendary guitar maker and the Grammy-winning artist. Mayer worked closely with the Martin team to craft his ideal guitar, combining top-shelf tonewoods and appointments with customized features tailored specifically for his playing style and needs.
After several years in development, the OMJM was unveiled in 2002 as John Mayer’s first-ever signature acoustic guitar. It quickly became a hit among guitarists for its premium construction and connection to Mayer himself. Over the past two decades, the OMJM has been Mayer’s go-to acoustic both on stage and in the studio.
To celebrate the OMJM’s 20th anniversary in 2022, Martin released an extremely limited run of only 100 "20th Anniversary" models with upgraded specs and collectible appointments. Whether in original or 20th Anniversary form, the Martin OMJM remains a highly coveted John Mayer signature model acoustic-electric.
Martin OMJM Specs and Features
The Martin OMJM John Mayer signature model acoustic-electric guitar has the traditional sloped-shoulder dreadnought body shape that Martin is known for. It’s crafted in the USA from all solid tonewoods, with a solid Sitka spruce top, solid East Indian rosewood back and sides, and a solid mahogany neck.
This guitar has a 25.4" scale length and comes equipped with a ebony fingerboard and 20 frets. The neck has a modified low oval profile that is extremely comfortable and playable.
For bracing, Martin uses their A-frame X-1 top bracing pattern to produce a balanced and articulate tone. There is also a special rear-shifted bracing technique used, which allows the top more freedom to vibrate.
In terms of electronics, the OMJM comes equipped with a Fishman Gold Plus Natural I preamp system. This combines an undersaddle transducer with a soundhole mounted condenser microphone for the most natural amplified acoustic tone. It features volume, tone, and 3-band EQ controls with a tuner out.
The OMJM signature model comes in two exquisite finish options. There is a standard Natural model with a gloss finish. And for the 20th Anniversary Edition, an Amber Sunburst gloss finish is available which really makes the flame maple binding pop.
Construction and Build Quality
The Martin OMJM John Mayer signature model is crafted to the highest standards that Martin is known for in their custom shop models. Every detail of the construction exhibits expert craftsmanship and meticulous attention to detail that is unparalleled in the acoustic guitar world.
The solid tonewoods are hand-selected for exceptional beauty, resonance and sustain. Only the most stunning figured maple is chosen for the back and sides, while the spruce top is crafted from tight, straight-grained wood. The neck is shaped from mahogany or ebony depending on the model. All the woods are perfectly bookmatched and oriented for strength and stability.
The OMJM features Martin’s patented mortise and tenon neck joint for maximum energy transfer between the neck and body. The dovetail neck joint is cut and fit by hand for seamless integration. The bracing is also hand-carved and scalloped in Martin’s Custom Shop to produce incredible volume, richness and dynamic range.
From sanding the solid wood components to applying the flawless gloss nitrocellulose lacquer finish, each step is meticulously executed by Martin’s master craftspeople. The abalone and mother-of-pearl inlays are precision cut and set by hand into the ebony fingerboard. Every detail down to the unique open-gear butterbean tuners makes it clear this is a premium instrument built to last a lifetime.
The OMJM exhibits Martin’s pinnacle craftsmanship with no cut corners or rushed production techniques. It exemplifies the Custom Shop credo of taking the time needed to produce an heirloom acoustic guitar worthy of being a signature edition.
Neck Profile and Playability
The OMJM has a modified low oval neck shape that is extremely comfortable and playable while still providing strength and stability. The nut width measures a very accessible 1 11/16 inches, allowing for easy fretting and chord changes.
The action is set exceptionally low right out of the case, measuring just 3/32" on the bass side and 5/64" on the treble side. This makes playing across the ebony fingerboard smooth and effortless. The medium jumbo frets are immaculately dressed and crowned for seamless bending and vibrato techniques.
Overall, the neck profile and factory setup result in a very playable acoustic-electric guitar that feels great whether seated or standing. The comfortable neck shape and low action invite hours of practice without hand fatigue.
Acoustic Tone and Sound
The Martin OMJM produces a rich, complex acoustic tone that showcases the premium tonewoods used in its construction. Sitka spruce is a popular top wood prized for its strength, lightness, and ability to project volume and dynamics. When combined with East Indian rosewood back and sides, known for their deep and complex bass response, the OMJM delivers a beautifully balanced and nuanced unplugged sound.
The dreadnought body shape further enhances the guitar’s tonal palette, allowing for a wide dynamic range. Notes ring out with full-bodied sustain, and chords have excellent definition across lows, mids, and highs. Whether gently fingerpicking or aggressively strumming, the OMJM’s organic acoustic voice maintains warmth and clarity. The bracing pattern and other construction details are optimized not just for volume, but exceptional tonal quality.
From percussive rhythms to intricate melodic lines, the OMJM brings out the best in any playing style. The unplugged acoustic tone remains balanced across the fretboard, with impressive projection that fills the room. For guitarists who appreciate the craft of fine acoustic instruments, the OMJM’s unadulterated tone is sure to impress.
Amplified Sound
The Martin OMJM delivers a very natural amplified tone that captures the rich, complex acoustic sound beautifully. When plugged into an acoustic guitar amp or PA system, the LR Baggs VTC pickup and voicing system provides a balanced, organic reproduction of the guitar’s true unplugged voice.
The guitar retains its woody resonance and full-bodied low end when amplified, with the Sitka spruce top projecting tons of sweet, singing overtones. The notes bloom with warmth and depth, rather than sounding thin or sterile through the electronics. The volume can be turned up substantially before any quackiness or feedback kicks in.
The onboard tone controls allow shaping the EQ to fit different live or studio scenarios. The midrange focus can be tweaked to cut through a mix, while still keeping the lows punchy and highs crystalline. Whether fingerpicking intricately or strumming full chords, the OMJM sounds fantastically amplified and balanced.
Overall, the LR Baggs system captures the OMJM’s world-class acoustic tone without coloring or muddying it. The guitar feels very responsive to playing dynamics and translates both gentle and aggressive strumming or picking equally well when plugged in. For players who need stage-worthy projection, the OMJM delivers incredible amplified performance.
Hardware and Appointments
The Martin OMJM John Mayer Signature model features premium appointments and hardware that contribute to both the look and sound of this guitar. The open-gear tuners are high-quality and keep the guitar in tune through heavy playing. The bridge pins are made from ebony, which adds to the overall aesthetic.
One standout visual aspect of the OMJM is the ornate fingerboard inlays. Rather than traditional dot inlays, this guitar has unique "winged" inlays with abalone and mother-of-pearl materials. This gives the fretboard an elegant look. The guitar also has multi-ply binding on both the top and back, providing a nice contrast along the edges.
The pickguard has an understated tortoise pattern that complements the natural finish. It protects the top from scratches while allowing the spruce to resonate freely. Overall, the hardware and appointments on the Martin OMJM are subtly luxurious, accentuating the premium build quality of this John Mayer signature model.
20th Anniversary Edition
To celebrate the 20th anniversary of the Martin OMJM, a special limited edition was released in 2022. Only 100 of these ultra-premium guitars were made, featuring several upgrades over the standard model.
The top is constructed from extremely rare Adirondack spruce, prized for its complex overtones that enhance volume and projection. Gorgeous flamed maple is used for the back and sides, providing a beautifully figured look along with warm, balanced tonality.
Upgrades include a special mother-of-pearl script logo inlay on the headstock, antique white binding, open-gear butterbean tuners with an ebony finish, and a custom hardshell case. Each 20th anniversary model is individually numbered for collectibility.
With these premium tonewoods and appointments not found on any other OMJM, the limited edition commands a significantly higher price. But for discerning collectors and John Mayer fans, the chance to own a unique ultra-limited anniversary model is highly appealing.
Pricing and Value
The Martin OMJM carries an MSRP of $7,999, putting it solidly in the ultra-premium price range for an acoustic guitar. However, authorized Martin dealers typically sell this model for around $6,500-$7,000 brand new. Looking at other similar high-end acoustic-electrics, the Taylor 914ce and Gibson J-45 Standard both have an MSRP of around $4,999. The Martin D-45 sells for about $10,000, but it lacks the cutaway and electronics of the OMJM.
Overall, the OMJM commands a premium price, but one that is justified by the use of rare, resonant tonewoods, exceptional craftsmanship, and its status as a John Mayer signature model. The limited production runs also make this a collectible instrument over time. While not cheap by any means, serious players looking for the ultimate acoustic guitar will find the OMJM well worth the investment.
Conclusion
The Martin OMJM John Mayer Signature acoustic-electric guitar is an exceptional instrument worthy of its association with the Grammy-winning artist. From its premium appointments to its versatile amplified tones, this guitar delivers on all fronts.
Overall, the OMJM is best suited for experienced players looking for a pro-level acoustic-electric suitable for studio work and live performance. While beginners may be tempted by the John Mayer name, the complexity and price tag make this a guitar better suited for seasoned musicians. The ideal OMJM owner is someone who appreciates fine craftsmanship and needs an acoustic-electric to cover various genres and playing scenarios.
In terms of rating, the OMJM earns top marks for its design, construction quality, playability, and tonal versatility. The amplified tones are rich and dynamic thanks to the Fishman electronics, while still retaining the fullness of an all-solid wood acoustic. Some may balk at the price tag, but it’s quite reasonable for a top-tier signature model.
On a scale of 1 to 10, the Martin OMJM John Mayer Signature model rates a 9.5 out of 10. It’s a phenomenal instrument that is worthy of being the top acoustic in any discerning guitarist’s collection. While the limited color options may turn some away, overall the OMJM delivers a playing experience comparable to much more expensive vintage Martins. Any John Mayer fan or serious guitarist/collector would be wise to strongly consider adding this beauty to their arsenal.