Let’s start at the heart and work outwards. The hex core is made with D’Addario high carbon ‘NY Steel’ which is unparalleled for break strength and tuning stability, then at the ball-end the wind is fixed with the ‘Fusion Twist’ soldered join so the ball cannot slip or move. This solid base is now wrapped with D’Addario’s proprietary Phosphor Bronze wire providing warmth, clarity and projection. OK, so already the makings of a set of world class strings! Now, the leap… the XS coating applied to the wound strings is an ultra-thin, inconspicuous film enveloping the WHOLE string which provides incomparable protection from contaminants for long-lasting tone and maximum life - no, it doesn’t fluff up over time either, they tested that, rigorously! The non-wound strings are treated with a unique polymer to match, culminating in a set of strings that leaves the rest of the field for dust.

D'Addario XS Acoustic Phosphor Bronze combines our most popular acoustic alloy with our most advanced string coating technology, resulting in clear tone, smooth feel, and superior tuning stability — all with the longest possible string life. Available in Phosphor Bronze for 6 and 12-string acoustic guitar, ranging from extra-light to medium gauges.

XS is breathing new life into coated strings. With its ultra-thin film coating on every wound string and a unique polymer treatment on the plain steels, XS offers our highest level of protection, for maximum life with an uncommonly smooth feel. XS also features NY Steel high carbon core and plain string wire, along with our exclusive Fusion Twist, for incomparable break strength and tuning stability. XS is the most innovative coated string ever created.

• 10 times thinner than a human hair?? ...and other facts about D'Addario XS.
• Ultra Thin Coating
• D'Addario XS features a unique material which is ten times thinner than a human hair. This, alongside a tremendous leap forward in coating technology, allows the string windings to be completely protected from contaminants providing maximum life with a smooth feel.
• All Six Strings Protected
• The plain steel strings on XS are treated with our unique polymer coating (originally developed for our XT range of strings) meaning all six strings are protected.
• NY Strong
• XS features our exclusive NY Steel core wire and plain strings for increased break resistance and unmatched tuning stability. Using advanced machines and processes at our Farmingdale wire facility, our premium quality, high carbon steel makes XS truly NY Strong.
• Unmatched Tuning Stability
• NY Steel and our famous Fusion Twist feature locks in the plain steel strings, preventing slippage and breakage at the ball end.
• Custom Made Wire
• Our in-house wire drawing machines produce musical instrument wire to our exact specifications. Controlling materials, equipment, processes and quality allows us to deliver extremely high quality products that meet your exacting standards.
• Six Sides of Stability
• D'Addario pioneered the hexagonal core wire and stay true to this standard today. Hex core construction ensures superior dimensional stability, durability and precise intonation.