DD Audio SL612 D4

Features: 12″ (30cm) subwoofer with EROM surround. High temperature 2.5″ voice coil Double layer spider system Three-layer flat diaphragm body 72oz magnet Coil gap ventilation at rear plate DD cast aluminum frame Speaker size (In): 12 Watts RMS: 300 - 600 Watt peak power: 1200 Impedance: D4 Voice coil (inch): 2.5 Data: Fs (Hz): 27 Qms: 7.906 Qes: 0.432 Qts: 0.409 Vas: 68.349 Xmech (MM): 40 Xmax (MM): 14.5 Dimensions: Frame outer diameter (cm): 31.9 Frame outer diameter with gasket(cm): 32.5 Mounting diameter(cm): 28.7 Mounting depth(cm): 10.5 Engine diameter(cm): 16,51 Motor depth(cm): 3.81 woofer displacement : 0.06 litre Shipping weight: 8 kg Enclosure Recommendation: Closed cabinet : 22.5-42 litres Bass reflex cabinet : 28-50 litres.