The Martin Kovar Luxe MK13 strings are designed for guitarists seeking a firm and expressive playstyle, with a generous volume reserve. The Kovar winding, an alloy of nickel and cobalt, provides definition in the attack and appreciable tonal stability, while the Martin Superior Performance core ensures a consistent feel under the fingers. In standard tuning as well as in aggressive playing, this Medium set highlights a dense and homogeneous sound, perfect for accompanying, recording, or making a rhythm stand out within a mix.