Gear article
D'Addario XSM1140 Mandolin Phosphor Bronze Strings
The D'Addario XSM1140 is a set of premium medium-gauge phosphor bronze mandolin strings featuring a specialized ultra-thin coating for extended life. Designed for durability and tuning stability, these strings incorporate NY Steel cores and proprietary Fusion Twist technology to maintain a classic acoustic tone.

Overview
The D'Addario XSM1140 strings represent a high-performance option within the brand's 'XS' line, specifically tailored for the mandolin. These strings are constructed using a phosphor bronze wrap wire, known for its balanced tonal properties, over a high-carbon NY Steel core. The primary innovation of the XSM1140 is its ultra-thin film coating and polymer treatment, which aims to provide maximum protection against oils and sweat without compromising the tactile feel of the string.
Core Technology and Construction
The structural integrity of the XSM1140 relies on D'Addario’s NY Steel, which is manufactured to offer superior break strength and enhanced tuning stability compared to standard steel strings. This is further supported by 'Fusion Twist' technology, a process that prevents slack in the twist of the loop end. This combination ensures that the strings can withstand aggressive strumming and fingerpicking while staying in tune for longer periods.

Sound Character and Performance
Tonal performance is defined by the classic D'Addario phosphor bronze character, which offers a blend of warmth and brightness with smooth articulation. Despite the protective coating, the strings are designed to provide a natural acoustic response. The medium 11-40 gauge provides enough tension for strong projection and volume, making them suitable for both solo performance and ensemble playing in genres such as bluegrass and folk.
Compatibility and Alternatives
These strings are designed for standard mandolins, such as the Ozark F-Model. While the XSM1140 focuses on acoustic longevity, players seeking different tones might look at alternative folk instruments or setups, such as the Tanglewood TWB 18 M5 Banjo or the Barnes & Mullins Irish Gaelic Tenor Empress. For those performing live with amplified setups, these strings pair well with instruments utilizing pickups like the L.R. Baggs or Fishman series.
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£475.00 ($603)Ozark
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Frequently asked questions
- What is the primary benefit of the XS coating on the XSM1140 strings?
- The ultra-thin film coating and polymer treatment provide a barrier against contaminants. This results in a significantly longer lifespan for the strings' tone and physical condition compared to uncoated strings.
- What gauges are included in the XSM1140 set?
- This is a medium-gauge set ranging from .011 to .040. These specific diameters are chosen to provide a balance of playability and acoustic volume.
- What is NY Steel and why is it used in these strings?
- NY Steel is a high-carbon steel alloy manufactured by D'Addario in New York. It is used to provide greater break strength and superior tuning stability compared to traditional steel cores.
- How does Fusion Twist technology affect mandolin performance?
- Fusion Twist prevents the string from slipping at the loop end. This ensures the string holds its pitch better during heavy playing and reduces the frequency of retuning.
- Does the coating affect the feel of the mandolin strings?
- D'Addario designs the XS coating to be exceptionally thin. This allows the strings to feel smooth and natural under the fingers, avoiding the 'slippery' feel associated with some thicker coatings.
- Are these strings suitable for bluegrass mandolin?
- Yes, the medium 11-40 gauge and phosphor bronze construction are standards in bluegrass. They provide the necessary punch and articulation required for the genre.
- Can I use XSM1140 strings on a tenor banjo?
- No, these are specifically designed for the mandolin. For instruments like the Tanglewood TUB4 Tenor Banjo, you should use strings specifically gauged for that scale length and tuning.
- What is the typical price for a set of XSM1140 strings?
- The typical price range for this premium coated set is approximately £19.00. This reflects the advanced materials and coating technology used in the manufacturing process.
- How does phosphor bronze differ from 80/20 bronze?
- Phosphor bronze generally offers a warmer, more balanced tone that lasts longer than 80/20 bronze. It is the preferred choice for players seeking a versatile, rich acoustic sound.
- Will these strings fit an F-style mandolin with an oval sound hole?
- Yes, these strings are compatible with both F-style and A-style mandolins, including models like the Ozark F Model Oval Sound Hole. They use standard loop ends common to most mandolin tailpieces.
- Do these strings work well with acoustic pickups?
- Yes, the balanced output of the phosphor bronze wrap provides a clear signal for pickups. They are compatible with bridge-mounted or internal sensors like those from Fishman or L.R. Baggs.
- Are these strings recommended for beginners?
- While beginners can use them, the medium gauge requires slightly more finger strength than light strings. However, the long life of the coating makes them a convenient choice as they require less frequent changes.
