EXP44, extra hard tension, is optimal for maximum string resistance and projection without compromising tone. D'Addario EXPs are the most natural-sounding, longest-lasting coated strings available. EXP Coated Technology starts with the highest quality wrap wire materials, precision drawn and micro coated on our advanced proprietary machinery. The ultra-fine layer of EXP Coating is bonded to the silver-plated copper wrap wire which is then wound onto a multi-filament core. The result is a built-in barrier against the corrosion and wear that can quickly sap the life out of your strings and your sound. EXP coated silver-plated copper classical strings have a natural round wound feel and sound fresh and bright with a "new string tone" that lasts three to four times longer than traditional guitar strings.
EJ45LP "lightly polished," normal tension, is D'Addario's best selling "lightly polished" set, preferred for its balance of rich tone and smooth feel. Pro-Arte lightly polished composite strings feature an exclusive multifilament core material which delivers a powerful, but warm tone which lasts 2-3 times longer than traditional classical strings. Each wound string is polished to a smooth surface for reduced finger noise. In addition to three traditional nylon treble strings, each set contains an optional monofilament composite 3rd/G string, which provides greater projection and optimal balance between basses and trebles. All Pro-Arte treble strings are sorted by a sophisticated computer-controlled laser machine which performs diameter/tension measurements and quality checks, ensuring true sounding, precise trebles in every set. Pro-Arte lightly polished sets are also ideal for recording.