See pictures for more specifications gathered from Dynaudio s website . New Studio grade Dyaudio core Sub made in Denmark has (4) four 9” woofers, so 36” of excursion for air movement. It plays down to 15 Hz with a 6dB roll-off at 13.5Hz. Built inside are dual 500-watt (1,000-watt) Pascal class-D amplifiers. Low bass that is highly accurate. Weights 108 lbs comes with power cord and 3m peel off leg stands has original crate shipped from Denmark for protected transportation. This core sub retails over $4k asking $3000 message me if you have any questions located in the San Bernardino Area near 210and 215 fwy can drive to LA area OC Palmsprings for serious buyers .