Martin OM-21 Review & Prices
- From Martin's 1930 Standard series
- Made in United States
- 6 strings
- 25.4"'' scale
- 16" Fretboard Radius
- Solid Spruce top
- Solid East Indian Rosewood back
- Solid East Indian Rosewood sides
- Select Hardwood neck
- Ebony fretboard
- Bridge pickup: Fishman (Preamp/Active)
- Ebony bridge
- Acoustic Modified Low Oval Set neck
- 20 Medium frets
- Nickel Open Gear tuners
- Weight between 4.05lbs (1.8kgs) and 4.35lbs (2kgs)
- Compare Specs >
Our Scores and Tone Evaluation
- Heavy Metal
- Hard Rock
- Jazz
- Blues
- Funk
- Country
Martin OM-21
- Made in United States
- Expensive Wood
- Bone Nut
- Top Brand Pickups
- Electronics
- Compensated Saddle
- Solid Top Wood
- Solid Side Wood
- Solid Back Wood
- Cheap Fret Wire (NS)
- No Locking Tuners
- No Compound Radius Fretboard
- No 21:1 Tuner Ratio
- No Strap Lock
Price Overview
Its average competitor's price is $3500, which means that the Martin OM-21 is around 14% cheaper than the competition. This takes into account all instruments of the same category in our database with 6 strings and Fixed bridge that are made in United States.
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Your feedback
Not all instruments are created equally. That's why it's important to have different opinions. Here's what our users who have played this instrument say. If you've played it before, help others by voting below!
Weight
VoteTuning stability
VoteNeck speed (thickness)
VoteNeck access to high frets
VoteNeck profile shape
VoteFret edges
VotePickups noise
VotePickups power
VoteIs it Easy to Play?
The Martin OM-21 meets 3 out of our 8 criteria items for beginner friendliness, which means that it's not recommended for complete beginners. This takes into account the type of frets, scale length, nut width, bridge type, fretboard radius, and neck profile to determine the easiest combination for new players to get used to.
New Player Friendliness
Martin OM-21- Easy-to-use bridge
- Tall frets
- Comfortable neck
- Comfortable shape
- Comfortable fretboard
- Narrow nut
- Short scale
- Soft Strings
- Locking tuners
Hand Size Comfortability
After taking into account the neck profile, scale size, fretboard radius, and nut width, we can conclude that the Martin OM-21's construction favors people with relatively small hands.
Nevertheless, this comes down in the end to personal preference. Make sure you test this guitar—or another one with similar characteristics—before buying.
How Lightweight is it?
We found that the Martin OM-21 weighs between 4.05lbs (1.8kgs) and 4.35lbs (2kgs). This was recorded from some online retailers that publish the weight of the instruments they sell.
Scale Length
Scale length is the distance the strings will span between the bridge and the nut. It can tell you a lot about the overall playability and tone of the instrument. A longer scale length means longer distance between frets, brighter tone and more string tension—which means lower action, but more difficult bending of the strings.
Here's the Martin OM-21's 25.4" scale length compared to other common sizes:
This is considered a long scale, but slightly shorter than what's commonly found in acoustic guitars.
Since the distance between bridge and nut is relatively long, strings will feel stiff and more difficult to bend, but the tone will feel brighter. It will also be less likely to produce fret buzzing and rattling when strumming hard.
Neck Profile
The neck profile tells you the thickness (neck depth) and shape in cross section. Every difference will completely change the feeling and comfortability of the neck. This is a highly subjective thing, but most players indeed prefer certain types of necks (like Cs and Ds) because they feel nice in most hands.
It has a C type neck. C-shaped necks like this have been the most popular for the last years. The reason is that they feel good in most hands. It's generally a thin neck that doesn't get in your way when playing fast, but that also has enough mass to give your hands a comfortable grip for chords if they aren't too big.
Thin necks like this make it easier to move your hand across the neck and it helps when playing fast solos, especially if you like to leave your thumb free while playing high on the fretboard. However, thinner necks are also weaker and will need adjustment more often than a thicker neck.
Fretboard Radius
When it comes to fingerboard radius, personal preference will dictate which one is better for you. However, most people seem to agree that a more curved (lower) radius will make it easier to play chords while a less curved (higher) radius is better for soloing and bending.
The Martin OM-21 has a 16" fingerboard radius.
Here's an image comparing this fretboard radius to other popular choices:
This fretboard radius is really different than Stratocasters, but it's also a lot flatter than Les Paul fingerboards. It'll heavily favor soloing over playing chords. This doesn't mean you can't use it for chords, but it will be more comfortable to play chords without muting strings in a more curved fretboard. Bending and sliding without losing sustain will also be more likely in a flat fretboard like this one.
Compound radius fingerboards give the best of both worlds. Unfortunately, the Martin OM-21 has the same radius across the board.
Playability compared to main competitors
Nut Width
The Martin OM-21 has a nut width of 44.5mm (1.75''). This is within the most common range of nut widths for a 6-string guitar. It offers a good balance of string separation at the nut. It's the size that most guitarists prefer as it gives them just enough space to play open chords without muting the strings, but without spreading the strings too wide and making bar chords difficult to perform.
Frets
It comes with nickel silver frets, so they won't last as long as stainless steel frets. If you use your instrument a lot, you might need to replace the frets after a few years. But this is unlikely as most people change instruments before this happens.
Fret Size
Finally, let's talk about fret size. Some people prefer tall frets because it's easier to press the strings and perform bends since there's less friction against the fretboard. On the other hand, some people like shorter frets because they like to touch the fretboard when playing, or because they got heavy hands and tend to press too much on the string and alter the of the note pitch accidently.
The Martin OM-21's frets are Medium size. With medium frets, you can feel the fretboard more than with jumbo frets, but it's still easier to press the strings cleanly than with small frets; notes might change their pitch just slightly if you press hard on the fret. Also, if you need to do some fret leveling after years of playing, you'll have some room to sand them down without having to replace them.
Playability Score
Tone Analysis
The type of wood and even the shape of the body will have a lot of influence in the final tone of an acoustic guitar. Here's we'll talk about what kind of tone you can expect from its specs.
Wood
Spruce Top: This wood has a light color with tight grain patterns. It's very stiff but relatively light. It's known for producing a well-rounded tone with a broad dynamic range.
Rosewood Back and Sides: Since the ban of Brazillian Rosewood, this has become a rare and expensive wood. It's not usually used for guitar bodies because of this, and also because it's heavy. Instead, it's used mainly for fretboards. Sometimes it's also used for necks because it's an extremely hard wood (even harder than maple). Its tonality tends to favor warm tones.
Hardwood Neck: This is just a generic hardwood that can come from many species. This type of wood is used to build guitars because it provides a rich, warm sound. The wood also has good structural properties, making it durable and long-lasting.
Ebony Fretboard: This is one of the most expensive woods there is, which is why it's mostly used for fretboards. It is dense, heavy, highly resistant and comes in a really dark color that gives any guitar a classy touch. Tone wise, it helps the high side of the spectrum and provides good sustain.
Pickups
This guitar comes with pickups from one of the top brands: Fishman. So you can expect well built pickups with great sound that shouldn't need an upgrade anytime soon.
Sound Score
Build Quality Analysis
Country of Origin
Knowing where the instrument is produced is a good way to know how well it's built. Some manufacturing countries are known for having higher quality standards. For example, most expensive instruments are made in the US or Japan, but there are some exceptionally great countries—like South Korea—that are building a good reputation.
The Martin OM-21 is made in United States. Guitars made in the USA have the reputation of being the best instruments you can get. This statement isn't as accurate as a few years ago, but you should still expect top-quality from a guitar made in this country.
Bridge
Ebony: The advantage of fixed bridges is that they don't require any kind of set-up. This makes it extremely easy when changing strings because you don't need to adjust anything besides tuning the guitar. Also, the fact that the bridge is directly attached to the body will help to increase sustain. The disadvantage is the lack of versatility since you can't create the same vibrato effects as with tremolo bridges.
Nut Material
Another important thing to analyze is the nut material, as it's one of the most important aspects that can affect the sound and playability of your guitar. A well-cut nut will make sure it stays in tune and will make it more comfortable to play.
In this case, the Martin OM-21 has a Bone nut. This material is one of the highest quality you can get. It provides excellent sustain and tune stability if cut well. The only disadvantage is that it's an organic material, so it's not consistent. Two different bone nuts, even if made from the same bone, will probably sound slightly different. However, bear in mind that this is only relevant when playing open strings.
Build Quality Score
All Specs
Martin OM-21User Reviews
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