Our new Classic Guitar strings offer brilliance and power, like carbon strings but also a full, warm sound you usually get from nylon strings. They wow with immediate attack and translate every impulse from your fingers. The new hybrid material designed by Thomastik-lnfeld makes it possible.The "Classic Guitar"strings offer brilliance and power, like carbon strings but also a full, warm sound you usually get from nylon strings. They wow with immediate attack and translate every impulse from your fingers. The new hybrid material designed by Thomastik-Infeld makes it possible.