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P280 Passive Radiator

 

The P280 is an 11 inch passive radiator with 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. A new basket design provides for perfect airflow without compression effects or turbulences.
The stated resonance frequency of the passive radiator is taken at 3mm excursion, offering a realistic value.

 

P280_DimWeb-Draht.png

Dome material  Sandwich
Application  Passive Radiator
Overall diameter  280 MM
Cutout Diameter/Square      251.2 MM
Overall depth      131.95 MM
Motor assembly depth  -
Motor assembly diameter  -
   

Main Features

Airflow optimised Basket Design
Robust Extra Mass Screw Mount
Soft Highshape Rubber Surround
Wideband Resonanztuning
15Hz - 45 Hz

TECHNOLOGY
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Mechanical Data

Specification         Value  Unit
Overall diameter    280 mm
Cutout Diameter/Square        251.2 mm
Min. frontplate thickness        8.45 mm
Overall depth         131.95 mm
Motor assembly depth        - mm
Motor assembly diameter    - mm
Screwfitting          DIN 7984 / Ø 4.50 mm
Terminal    - mm
Shipping weight (pair)          4.5/3.8 Kg
Shipping box size (pair)   300/180/300 mm
   

Thiele/Small Parameters

Specification   Value  Unit
Sensitivity (2.83V / 1m) SPL - dB
DC-resistance  Re - Ohm
Resonance frequency      Fs 21 Hz
Equivalent volume of air  Vas 226 ltr
Mechanical Q      Qms -  
Electrical Q  Qes -  
Total Q  Qts -  
Effective piston area  Sd 408 Cm2
Moving mass      Mms 63 g
Suspension compliance      CMs 0.94 mm/n
Mechanical resistance      Rms 1.87 Kg*s
   

voice coil parameters

Specification    Value  Unit
Power handling  P - W
Linear excursion  Xmax +/-13 mm
Voice coil diameter    - mm
Voice coil former material        -  
Voice coil material        -  
Voice coil inductance      Le - mH
Force factor      Bl - N/A
Motor type        -  
Ferrofluid filling    No  
   

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