All TS-W series subwoofers are designed to produce high-quality sound. They are equipped with a fully enclosed basket, which suppresses repulsion efficiently, ensuring accurate, clear and rhythmical bass. Each sub also comes with advanced technologies, such as a Pioneer patented IMPP composite cone, a rigid 3D-shaped cone design, and large double stacked magnets. On top of that, these TS-W series offer easy installation in many different cars. Get powerful, punchy bass in your car from the pedigree of world record-breaking subs. The TS-W311 is suitable for both open-air and enclosed spaces.