Modular subwoofer for simpler and easier repairs. Now repairs can be done in a matter of minutes. The subwoofer has an honest RMS – 4500 watts, as well as even better efficiency than previous models.   General feature Power Handling (RMS) 4500 W VC diameter / material 4" Flat aluminum VC wire insulation Polyimide Frame material Aluminum Magnet size and q-ty 256*26mm x 3 pcs / 10.08*1.02" x 3 pcs Spider diameter and q-ty 250mm x 6pcs / 9.84" x 6pcs Cone material Carbon (real) Dust cap material Carbon (real) Parameters DC Resistance (Re) 0.75+0.75 Ω Free Air Resonance (Fs) Hz 27.1 Moving Mass (Mms) g 360 BL Tm 19.7 Total Speaker “Q” (Qts) 0.211 Electrical Q (Qes) 0.227 Mechanical Q (Qms) 3.77 Equivalent Compliance (Vas) L 37.2 One-Way Linear Excursion (Xmax) (BL 50%) mm 36 Sensitivity (1 W / 1 m) dB 87.1 Sensitivity (2,83 V / 1 m) dB 92.1 Effective Piston Area (Sd) cm² 530 Physical Specifications Overall Diameter 325mm / 12.8" Mounting Hole Diameter 307mm / 12.09" Mounting Depth 260mm / 10.24" Driver Displacement 6 l / 1.59 Gal Net Weight 42 kg / 92.6 lbs