The durable MDF wood construction is designed to reduce vibration. Additionally, a special bonding sealer is used to create an air-tight seal to increase joint strength as well as bass reflex. The spun aluminum cone stays rigid even with the most powerful bass notes. Alphasonik's compact down-firing enclosures perform superbly, producing extreme bass with minimal space. CAR, CAR AUDIO, MUSICA, CHIPEO, 12VOLTIOS, SOUND CAR, SONIDO, CHIPEO TV, SOUND SYSTEMS, KIPITO, CHUCHERO, DRIVER, TWEETER, SPEAKER, DRIVER.