Topmusicanswers
The wound string will stay flexible to a higher gauge. Tonally, a plain G will sound closer to the plain B and E strings in a set, while a wound G will sound closer to the other wound strings in the set (E, A, and D). ... If you're going for a heavier string set, a wound G will probably work well for you.
What are wound and unwound strings?
The terms are "wound" and "unwound" or "plain". The larger gauge strings are a thin wire wrapped around a solid core. If a larger wire was simply used then it would be stiff and inflexible. Take this cross-section.
Is wound G string better?
Generally speaking, with a wound G string you'll get better intonation on your guitar, and better tuning stability. Many guitarists think that a wound G string just sounds better, and balanced better tonally in a set with its fuller, warmer sound.
What is wound string?
Wound strings are also known as "overspun" strings. ... The string consisted of a core string made of gut, with a thin wire wound around it with multiple turns. This construction is still predominate in today's wound strings with variations on core shapes and materials.
