8" SPEAKER DRIVER - Delivers powerful sound with highly accurate, distortion-free bass to provide you with a better listening experience. LOW PASS FILTER WITH FREQUENCY RESPONSE DOWN TO 38Hz - Ensures that your woofer only plays sounds too low for your speakers to properly output. Supplement your speakers great high and mid-range with bass you can really feel. THICK MDF WOODEN ENCLOSURE - We use high quality, dense fiberboard materials that offer reduced acoustic resonance for better audio quality. AUTOMATIC STANDBY - Save on electricity with an auto standby feature that ensures the woofer is not unnecessarily using up power when it's not being used. 2 YEAR WARRANTY - Edifier guarantees you'll have an amazing experience with our products. Buy with confidence, and enjoy our 2 year warranty.