FARMINGDALE, New York – First there was XL, then EXP, then NYXL. Available now is D’Addario X: our most technologically advanced series of strings created for electric, acoustic, classical, bass, and folk instruments. Our Research & Development team has been working to combine all of D’Addario’s uncompromising innovations like extended life treatments, NY Steel, and Fusion FARMINGDALE, New York – First there was XL, then EXP, then NYXL. Available now is D’Addario X: our most technologically advanced series of strings created for electric, acoustic, classical, bass, and folk instruments. Our Research & Development team has been working to combine all of D’Addario’s uncompromising innovations like extended life treatments, NY Steel, and Fusion