21'' inch super bass speaker 5inch voice coil Maximum Power Handling 4000w rated power 1500watt sub woofer for outdoor show

MODEL:GB21125
General Specifications 
 Nominal diameter:545MM/21 inch 
Nominal impedance:8 ohm 
Minimum Impedance :6 ohm 
Nominal Power Handling:1500W 
Continuous Power Handling:3000W 
Sensitivity 1W/1M :96.5 dB 
 Frequency range:30 - 1000 Hz 
voice coil diameter:125mm/5 inch 
Winding Material :Copper 
Paper cone material:import RDM cloth-edge 
Magnet :Φ250 Ferrite Ring 
 Thiele & Small Parameters 
 Fs (Resonance Frequency):30Hz 
Re (DC Resistance):5.1 ohm 
Qms(Mechanical Factor ):10 
Qes(Electrical Factor ):0.24 
Qts(Total Factor ):0.23 
Vas(Equivalent Cas Air Load):269L 
Mms(Effective Moving Mass):407gr 
Bl(BL Factor ):40.8T.m 
Sd(Effettive Piston Area):1680cm² 
Mounting & Shipping Information 
 Overall Diameter: 545mm
 Bolt circle Diameter:520mm 
 Baffle Cutout Diameter :500mm 
 Depth:248mm 
 Net Weight:19.5kg 
 Shipping Weight:21.3kg