Accuton P220

8" (20cm) Aluminium- Passivmembran

Extra mass can easily be added to tune the  resonance  frequency. A simple 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, to give a realistic value. It can be calculatd by the following equations:

Fres= sqrt[1/(Cms corr.) x Mms x 4 pi^2)]  with  Cms corr.= 1/[(1/Cms) + 1/((Vb/Vas) x Cms)]

Mechanical Data:

•     Overall diameter/square: 220 mm
•     Cutout diameter/square: 190,5 mm
•     Frontplate depth: 9 mm
•     Overall depth: 76 mm
•     Motor assembly depth: -
•     Motor assembly diameter: -
•     Screw fitting:  DIN 7984, 4 mm
•     Terminal: + : 6.3 x 0.8 / - : 4.8 x 0.8
•     Shipping weight /net weight (one piece): 0,96 / 0,64 kg

Thiele / Small Parameter:

•     Sensitivity Lp (2.83V / 1m): -
•     DC-resistance Re: -
•     Resonance frequency Fs: 41 Hz
•     Equivalent volume of air Vas: 26,5 L
•     Mechanical Q Qms: -
•     Electrical Q Qes: -
•     Total Q Qts: -
•     Effective piston area Sd: 224 cm²
•     Moving mass Mms: 23,4 g
•     Suspension compliance Cms: 1,64 mm/N
•     Mechanical resistance Rms: -

Voice Coil Data:

•     Power handling P: -
•     Linear excursion xmax: +/- 11 mm
•     Voice coil diameter: -
•     Voice coil former material: -
•     Voice coil material: -
•     Voice coil inductance Le: -
•     Force factor Bl: -
•     Motor type: -