6 Best Acoustic Guitar Strings for Warm Sound(2023)

Most of us turn to music for comfort and warmth, a somewhat elusive goal in a cold world.

It offers a perfect rescue when you need to shut off the rest of the world and also an avenue to connect with others. Acoustic Guitar Strings produce the warm and mellow sound of an acoustic guitar, a pure and organic sound that is rich and dark as well that many enjoy.

The tone is subjective, and acoustic guitars with a warm tone are held in higher regard. You are probably wondering what warm sound means; it implies an emphasis on bass to lower mid-range.

We experience various frequency spectrum ranges as varied feelings. Different frequencies balance from varying worlds. For instance, music with muted highs and heavy low mids is warm while boosted highs and muted mids produce cold sounds.

Although you can warm your guitar’s tone by altering the picking hand’s position or changing picks, purchasing the right strings is a sure way out.

If you are in a hurry, here is a summary of our top picks:

Best Acoustic Guitar Strings for Warm Sound Reviewed

C.F. Martin & Co. Acoustic Guitar Strings

Martin is well-known for its high-quality products, so it is not a surprise that they produce premium strings. The Martin MSP7050 has a Cleartone Proprietary Technology treatment. The technology safeguards the wrap wire and core from corrosion without interfering with the natural feel or tone.

These strings are ideal for warm tones because, unlike the regular bronze strings, the Martin MSP7050 is manufactured using Phosphor bronze, making them slightly warmer and brighter. With these strings, you will get more balanced and warm tones from a bronze that also lasts much longer.

Besides facilitating a smooth playing experience, better sound, feel, and appearance, it also lowers finger drag. They produce high-quality studio performances, and you can jam with them for prolonged periods.

The Martin MSP7050 is an excellent option because its tones tend to gather enthusiastic praise.


  • Well built.
  • Great quality.
  • Durable and long lifespan.
  • Consistent since they maintain their lively and bright tone.
  • Good tone.


  • They offer a shorter lifespan compared to Elixir strings.

Ernie Ball Aluminium Bronze Light Strings

Although the Ernie Ball brand is new to the market, it has garnered loyal users through its brand loyalty.

It has three famous strings for acoustic guitars: the earth-wood 80/20 bronze set, aluminum bronze, and earth-wood phosphor bronze.

The aluminum bronze wrap wires and steel hex cores generate crisp, brilliant highs and pronounced lows from acoustic guitars of all kinds. These strings are designed explicitly for acoustic guitars.

The aluminum and copper blend well, giving you a treble sound and rich, deep bass, making the Ernie Ball Aluminium Bronze strings a good choice for a warm sound.


  • They are loud.
  • Generate a balanced tone with a lot of definition and clarity.
  • Solid quality control.
  • Pocket-friendly prices.
  • Available as two sets with six strings each.
  • Picks up left hand’s movement and fingerpicking’s subtleties.


  • Less durable than those with NANOWEB coating.

Elixir 80/20 Acoustic Guitar Strings

Elixir is famous and appreciated for its continued support of music, and for manufacturing high-quality musical products like the Elixir 80/20 acoustic guitar strings.

These strings are the result of the company’s strive to produce premium strings that facilitate lovely playtime. They are highly durable, so you can stop worrying about making replacements often.

The Elixir 80/20’s gives you protection from elements that can interfere with your jamming sessions but keep in mind that dirt and debris can affect its appearance. The Nanoweb coating brings out a smooth feel and facilitates a crispier and brighter sound while maintaining the traditional sense.

The interior and exterior coating offers protection on the visible parts and gaps between windings. These strings’ construction features great attributes like full coating, rust plating, and nanoweb coating to give you what you deserve.


  • Complete coating.
  • Has Nanoweb coating for a smooth feel.
  • Excellent protection from dirt, air, and dust.
  • Generates a warm and resonant tone.
  • Highly durable.


  • A bit costly.

D’Addario EJ11 80/20 Acoustic Guitar Strings

D’Addario is a reputable company that incorporates quality, state-of-the-art technology, and innovation in the music sector. The company produces superior acoustics guitar string that brightens your guitar-playing experience.

The EJ11 80/20 are high-quality acoustic guitars that create warm sounds. It is a top choice for any guitarist looking to make warm sounds while freestyling, recording, doing a concert, or practicing at home.

Due to the steel core formed from six angles, the EJ11 80/20 sounds quite clear. These strings offer an ideal balance of comfortable playability, projection, and volume.

The environmentally friendly guitar strings have corrosion-resistant packaging and an extra-bright tone with projecting and deep bottom end. The EJ11 80/20 is made with perfect playability and tone equalization, and excellent acoustic measurement.


  • Highly durable.
  • Great built.
  • Consistent.
  • Made in the USA.


  • Poor tone quality.

Related: How much pressure do you put on guitar strings?

D’Addario XTAPB1356 XT

The XT acoustic guitar strings with Phosphor Bronze winding materials produce a warm and full sound. The 13-56 set functions well, particularly for this type of tone; however, slightly different gauges may work well based on your preferences.

The XTAPB1356 XT has an exciting construction because the bronze and phosphor alloy make the strings last longer and more durable. Therefore, as long as the coating stays on, you should not worry about rust, and the strings will maintain their new-string sound, much longer.

The coating also adds warmth to the entire tone. With these strings, you can generate enough warmth and still retain a bit of the much-needed attack.


  • Excellent warmth tone.
  • Great price for a quality product.
  • Highly durable.


  • May not be ideal for everybody’s taste.

Martin Marquis Silked Strings MA170S

Martin holds a similar position that Fender and Gibson have for electric guitars.

However, besides the guitars, the company also makes exceptional strings for guitars. Although there are many options available, the Marquis Silked set features a 92/ 8 phosphor and bronze mixture.

The material combination gives these strings plenty of warm tones. You won’t go wrong with the Marquis silked if you want a controlled, mellow, warm sound.

The absence of coating can be a downside, but your preference determines that. The longevity of the strings would have been improved by layering, but that would make them costly. Nonetheless, these excellent strings exhibit great playability and warm and mellower sound, so the lack of coating should not deter you from buying.


  • A smooth, natural, and mellow tone.
  • Attractive price for a quality product.


  • The coating would have them last longer.

Choosing Acoustic Guitars Strings For Warm Sound

Acoustics guitars remain evergreen and iconic instruments because of their warm and rich sound.

Strings play a core role in influencing acoustic guitars’ tone, so if you are looking to generate warm sounds, you must carefully choose the strings. Individual specifications are critical to producing a warm sound, including coatings, string gauge, core shape, winding type, and winding materials.

String Gauges

The thickness or string diameter makes up the string gauge, including the core and two times the winding wire’s thickness. Heavier string gauges emphasize the low to mid-range frequencies while the lighter string gauges emphasize higher frequencies leading to brighter tones.

Several string gauges for acoustic guitars are medium and light and sometimes decadent. Although super extra light and extra light/ super light are not used often, they are not difficult to find.

Besides influencing the tone, string gauges put a certain amount of tension on a guitar’s neck, affecting its playability and, ultimately, the tone. With lighter string gauges, a guitarist can bend and fret notes easily. Heavier string gauges emphasize the lower frequencies, produce more sustain and volume, and have higher tension, making it harder to fret.

Strings with heavier gauges contribute more to a warm tone, but you will use more effort to play. You can also try hybrid strings that give you a combination of the lighter gauge treble strings’ lower tension and the heavier gauge bass strings’ warmth.

Core Shape

Acoustic guitars typically have two unwound and four wound strings, and if you look at a wound strings’ cross-section, you will realize the outer windings’ hexagonal steel core. Although hexagonal cores are prevalent nowadays, round ones were the only option in the past.

Hexagonal core wires facilitate a more reliable machine winding as round ones are more susceptible to unraveling because the rounded surfaces do not offer excellent grip like the hexagonal shape’s rougher edges. Although it is debatable, many people claim that round core wires are more flexible, have better clarity and sustain, last longer, and produce warmer tones.

Round core wires do not necessarily generate a warmer sound. It is the belief that hexagonal cores increase brightness due to the lower string density.

Winding Materials

Acoustic guitars use different materials and even various material combinations, selected mainly for their tonal or resonant properties. The standard choices are Phosphor Bronze and 80/20 Bronze, plus less common materials such as silk.

80/20 Bronze

The 80% Copper and 20% Zinc combination translate to brass, not Bronze. These strings are popular for bright, crisp, but less durable than phosphor bronze strings, so they do not remain bright for long, based on how often you use the guitar.

Some players love the sound produced by the slightly worn-out 80/20 bronze strings. However, guitarists that prefer the new string sound will need to make frequent replacements.

Phosphor Bronze

These strings are bronze-wound with phosphor added, making them corrosion-resistant. They tend to keep their elasticity and tonal qualities longer than 80/20 bronze. Furthermore, Phosphor Bronze usually has a warmer and more balanced tone.

Silk and Steel

Although they are still called silk and steel strings, they now use nylon instead of silk, with the nylon filament acting as the sleeve, sitting between the wound strings’ metal windings and the steel core. This protective layer makes the strings project lower volume but soft on the fingers, making them ideal for fingerstyle players.

They do not typically generate warm sounds but relatively mellow sounds and have classical guitar strings feel.


Approximately one-third of Copper, two-thirds Nickel, and small quantities of Iron create Monel. It was selected as a steel guitar strings’ material because it produces excellent clarity, particularly in lower frequencies, and it is resistant to corrosion.

Winding Type

This refers to the wound strings wires’ profile, and they are available in three forms.


These strings have a round profile, and since they are less costly to manufacture, they are more budget-friendly than flat wounds. Due to their affordability, roundwound strings are standard but keep in mind that they wear faster. They generate brighter sound, more sustain, and volume than flatwound strings.

The round profile separates more effortlessly when you bend the string and more flexible. Additionally, the space between each wire provides a more textured, leading to more string noise than flatwound strings.


The surrounding wires’ square profile gives these strings a smoother, flatter surface. Although they are more costly to make, they are more expensive than roundwound but more durable. They have lower string noise than roundwound strings because the fingers can glide over without much friction.

They give out the warmer sound with less focus on harmonics and more attention on the fundamental tone. Unfortunately, you will need more effort to do bends because the surrounding wires don’t separate in the same manner as roundwound strings.


These are a compromise between roundwound and flatwound with partially square individual wires. However, they are less common.

Jazz guitarists tend to favor flatwound strings because they usually prefer warmth over brightness, clarity over sustain, and often do not perform bends.

4. Coated Strings

The Elixir Company transformed the guitar industry by introducing coated strings, which involved using a micro-thin polymer coating to cover the strings. The barrier protects the metal from damaging substances like sweat, dirt, dust, skin, and oil.

Coated strings last longer compared to uncoated strings, are smoother and less squeaky. At the moment, there are two types of coating, Polyweb, which is heavier, more durable with a softer feel, and Nanoweb, which is lighter and sounds and feels closer to uncoated ones.

Although coated strings are more costly than uncoated ones, they usually last longer. However, they lower the brightness, which is a common complaint about these strings.

Keep in mind that warmth isn’t brightness’ polar opposite, so lack of it does not automatically translate to warmer tones.

Also, read: Electric Guitar Strings for Blues


How Do I Choose The Right Acoustic Guitar Strings For Warmth Sound?

Besides paying attention to factors like coatings, string gauge, core shape, winding type, and winding materials, the right strings depend on your budget and playing style.

Should Guitar Strings Be Tight?

An acoustic guitar’s tension is based on your preference. Some players enjoy tight strings, while others prefer loose strings. However, if they are so tight that you experience their tightness while playing, consider getting lighter gauge strings.

How Else Can I Get A Warm Sound from An Acoustic Guitar?

While purchasing acoustic guitar strings that generate a warm sound is one way, there are other things you can do to get a warm sound. You can use a softer and thicker pick, pluck/pick over the soundhole, or tunedown.


Considering the importance of strings to an acoustic guitar’s tone, it is paramount to choose the best acoustic guitar strings for a warm sound. Remember that what will work well for someone else may not deliver the best outcomes for you. However, although it can be a tiring and challenging process, we hope this guide helped you better understand the available strings for warm sound and make the right choice.

Frequently Asked Questions

Which guitar strings are best for achieving a warm tone?

In the world of string instruments, string material choice hugely impacts the quality of the sound produced. For a warmer tone, most acoustic guitarists prefer bronze and phosphor bronze strings. These materials are esteemed for producing a tone that is not only deep but also rich, infusing a certain warmth into the music. However, it’s crucial to note that the string gauge should be compatible with your guitar. Just like a shoe fits differently for each foot, guitars react differently to various string gauges. So, always double check and make sure you select the right gauge for your instrument.

When it comes to a warm sound, what are the preferred strings for an acoustic guitar?

The heart and soul of an acoustic guitar reside in the choice of strings. Different materials of strings cater to different tonal requirements. If warm and rich overtones are what you are after, phosphor bronze and 80/20 bronze strings have a track record of excellence in delivering those qualities. Particularly, phosphor bronze strings stand out for crafting a harmonious sound with a focus on midrange frequencies, thus producing a much-desired warm undertone. Remember, strings are the lifeblood of your guitar’s sound, so make sure you invest in good quality strings that match your guitar’s construction and your tonal preference.

Which guitar strings should I choose for a mellow sound?

If it’s the mellowest sound you’re after, then nylon strings are your best option. They are the preferred choice for classic and flamenco guitarists because of their smooth and buttery tone that is gentle on the ears. If you’re an electric guitar player looking for a mellower sound, flatwound strings might be the way to go. These strings are revered for their old school mellow tone, providing a break from the bright tones of traditional roundwound strings. All in all, remember that the style and genre of music you play also play a role in choosing the right string that resonates with your sound need.

How can I make my acoustic guitar sound warmer?

A warm sound from an acoustic guitar can be achieved through various methods, including changing your pick, manipulating the position of your playing on the string, switching to warmer sounding strings, replacing the nut and saddle, tweaking your preamp settings, and adjusting the intensity of your pick’s attack. It’s interesting how these little adjustments can bring a lot of difference to the overall sound produced. My personal experience led me to discover that using a heavier pick gave a more solid sound implying a warmer tone. So you can experiment with these aspects and see what works best for you and your guitar.


I'm Johnny, the guy behind Guitar Manifesto. I've been playing guitar since my teens and now that I'm in my 40s, I'm all about sharing what I've learned to help you become a better guitarist.

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