D’Addario has added nine sets to its strongest guitar string line: the NYXL. These additions make 15 NYXL sets available, now including 12-60, 12-54, 13-56, 12-52, 11-56, 11-52, 9.5-44, and Balanced Tension 9-40 and 10-46. The NYXL strings boast a newly engineered, break-resistant, high-carbon steel core and plain steel alloy. NYXLs provide more strength and up to 131-percent greater tuning stability as compared to traditional nickel-wound sets. The reformulated nickel-plated steel alloy has greater magnetic properties, resulting in higher output and enhanced mid-range frequency response, modernizing the overall tone without losing the nickel-plated steel feel. For details, call 631.439.3300 or visit daddario.com.