P220

Passive Radiator

Dome material	Passive Radiator
Application	Passive Radiator
Overall diameter	220 MM
Cutout Diameter	190.5 MM
Overall depth	76 MM
Motor assembly depth	-- MM
Motor assembly diameter	-- 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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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)]

Mechanical Data

Specification	Value	Unit
Overall diameter	220	mm
Cutout diameter	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	45.89	ltr
Mechanical Q	Qms	20
Electrical Q	Qes	0
Total Q	Qts	0
Effective piston area	Sd	224	Cm2
Moving mass	Mms	23.4	g
Suspension compliance	CMs	0.644	mm/n
Mechanical resistance	Rms	0.301	Kg*s

voice coil parameters

Specification		Value	Unit
Power handling	P	0	W
Linear excursion	Xmax	12	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