An 8"driver delivers powerful sound with highly accurate, distortion-free bass to provide you with a better listening experience. This woofer use a low pass filter with a frequency range down to 38Hz. This 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. For the enclosure ,we use high quality, medium density fiberboard (MDF) materials that offer reduced acoustic resonance for better audio quality. Save on electricity with an auto standby feature that ensures the woofer is not unnecessarily using up power when it's not being used. Edifier guarantees you'll have an amazing experience with our products. Buy with confidence, and enjoy our 2 year warranty.