The ultimate bronze round wound acoustic string! The SPECTRUM BRONZE strings are specially designed for the demands of professional recording, yet is also unsurpassed in live performance situations. A unique bronze formula, combined with Thomastik-Infeldâs mastery of mechanical filtering with their silk inlay technology, gives a full warm tone, with a sparkling clarity that lets you cut through a dense sound mix. Playing feel is very balanced, and they are surprisingly long lasting. Available in 6 and 12 string sets.