Home / PD216ND Specifications TYPE Subwoofer Nominal Diameter 548 mm/21 in Rated impedance 8 ohm Nominal (AES) 3000 W Continuous Program 6000 W Sensitivity(1w/1m) 102dB Frequency Range 29Hz-600Hz Voice Coil Diameter 153 mm/6 in Voice Coil Material Copper out/in Mounting lnformation Overall Diameter φ547 mm/φ21.54 in Bolt Circle Diameter φ527 mm/φ20.75 in Mount Baffle Cut-out φ508 mm/φ20 in Depth 261 mm/10.28 in Bolt Hole Diameter 8-φ8mm/8-φ0..37 in Thiele Small Parameters Fs 30 Hz Re 6 ohm Qms 8,18 Qes 0,3 Qts 0,29 Vas 330 L Sd 0.18 m2 Mms 416 g BL 39 T.M Shipping lnformation Net Weight ( 1 unit) 18.7kg Shipping Weight ( 1 unit) 22 kg Package Size ( 1 unit) 59×58.5×34.5CM