The source of energy in a golf ball is its core. Its construction type is what affects the spin rate (control), velocity (distance), and compression (feel). The core of a golf ball is either a wound core
or a solid core.
A wound core is a small solid or liquid filled rubber sphere that is wound with rubber thread. A sold wound center is simply a small, solid rubber ball. The liquid wound center is a small, hollow rubber ball that is filled with either a liquid or a paste. With both types, either the centers are wound to a predetermined size to optimize velocity and spin and then a balata or durable cover is applied. The amount of thread used per golf ball will vary. Usually, about 35 yards of thread will be stretched to about 275 yards as it is wound. A wound core construction is also referred to as a three-piece ball.
A solid core in a two-piece ball is composed of a single piece of solid, elastic material. The solid core is typically made of a high resiliency rubber compound with a blend of additives to further enhance its performance. A cover is then applied.