12" Sub 30 Active Subwoofer, H-AUR-30, HECO, Active bass reflex subwoofer, 300 mm woofer, 50 - 150 Hz adjustable, 125/250 watts, 20 - 150 Hz, Housing only 350 x 465 x 415 mm Including stand and terminal 350 x 465 x 445 mm, 19.5 Kg, Stereo low-level inputs Phase continuously adjustable from 0 ° to 180 ° Volume and crossover frequency continuously adjustable Automatic standby switch Power switch