P280

Passive Radiator

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

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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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.

Mechanical Data

Specification	Value	Unit
Overall diameter	280	mm
Cutout diameter	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	26
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	0.31	Kg*s

voice coil parameters

Specification		Value	Unit
Power handling	P	-	W
Linear excursion	Xmax	12	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