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P220 Passive Radiator-Passive Radiator

The P220 ist a 8 inch Passive Radiator with an Aluminium Sandwich Dome. Extra mass can easily be added to tune the resonance frequency. A simple but robust screw mount provides fixing of stainless steel discs in the desired quantity.
The values of Vas and Cms allow for extensive tuning and various box sizes.

The stated resonance frequency of the passive radiator is taken at 3mm excursion, offering a realistic value.

It can be calculated as follows:
Fres= sqrt[1/(Cms corr.) x Mms x 4 pi^2)]  with  Cms corr.= 1/[(1/Cms) + 1/((Vb/Vas) x Cms)]

P220_DimWeb-Draht.png

Dome material  Passive Radiator
Application  Passive Radiator
Overall diameter  220 MM
Cutout Diameter/Square      190.5 MM
Overall depth      76 MM
Motor assembly depth  0 mm
Motor assembly diameter  0 mm
   

Main Features

Robust Extra Mass & Screw Mount
Soft Rubber Surround
Low loss Spider and Surround
Resonance Tuning
20 HZ - 60 HZ 

TECHNOLOGY
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Mechanical Data

Specification        Value Unit
Overall diameter   220 mm
Cutout Diameter/Square          190.5 mm
Min. frontplate thickness    9 mm
Overall depth        76 mm
Motor assembly depth          0 mm
Motor assembly diameter    0 mm
Screwfitting         DIN 7984 / 4mm mm
Terminal    0 mm
Shipping weight (pair)        6.3 Kg
Shipping box size (pair)   250/290/250 mm
   

Thiele/Small Parameters

Specification    Value Unit
Sensitivity (2.83V / 1m) Spl 0 dB
DC-resistance  Re 0 Ohm
Resonance frequency  Fs 41 Hz
Equivalent volume of air  Vas 26.5 ltr
Mechanical Q      Qms 0  
Electrical Q      Qes 0  
Total Q  Qts 0  
Effective piston area      Sd 224 Cm2
Moving mass      Mms 23.4 g
Suspension compliance      CMs 0.64 mm/n
Mechanical resistance  Rms 0 Kg*s
   

Voice Coil Parameters

Specification    Value  Unit
Power handling  P 0 W
Linear excursion  Xmax 11 mm
Voice coil diameter          0 mm
Voice coil former material    0  
Voice coil material          0  
Voice coil inductance      Le 0 mH
Force factor  Bl 0 N/A
Motor type    0  
Ferrofluid filling    No  
   

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