18inch 1000W woofer speakers professional  waterproof subwoofer 

General Specifications 

 Nominal diameter:463MM/18 inch 

Nominal impedance:8 ohm 

Nominal Power Handling: 1000W 

Continuous Power Handling:2000W 

Sensitivity 1W/1M :95dB 

Frequency range: 25 - 1500 Hz 

voice coil diameter: 125mm/5 inch 

Winding Material :Copper 

Magnet : Ferrite ring 

Thiele & Small Parameters 

Fs (Resonance Frequency ):29Hz 

Re (DC Resistance):5.5ohm 

Qms(Mechanical Factor ):8.8 

Qes(Electrical Factor ):0.36 

Qts(Total Factor ):0.35 

Vas(Equivalent Cas Air Load):235L 

Mms(Effective Moving Mass):269gr 

Bl(BL Factor ):27T.m 

Sd(Effettive Piston Area ):122cm² 

Mounting & Shipping Information 

 Overall Diameter :463mm 

Bolt circle Diameter :440mm 

Baffle Cutout Diameter:420mm 

Depth:200mm 

Net Weight:12.8kg Shipping Weight:14kg