WR 130
130 WR 26 81 CD
4 ohm    -   
Order ID: 830512

High quality 5" CD woofer designed for installation is cars. The 830512 has a cast diaphragm and high efficiency. The basket is adapted to car standards fitting into most cars when for instance mounted in the doors.
WR 130
Thiele Small parameters:     Free air Common Baffled
Nominal impedance Zn (ohm)   4  
Minimum impedance/at freq. Zmin (ohm/Hz)   3.6/307  
Maximum impedance Zo (ohm)   22.8  
DC resistance Re (ohm)   3.3  
Voice coil inductance Le (mH)   6.0  
Capacitor in series with 4 ohm
(for impedance compensation)
Cc (µF)   22  
Resonance Frequency fs (Hz) 67.5   66.2
Mechanical Q factor Qms   3.48   3.55
Electrical Q factor Qes   0.59   0.60
Total Q factor Qts   0.50   0.51
F (Ratio fs/Qts) F (Hz)     129
Mechanical resistance Rms (Kg/s)   1.17  
Moving mass Mms (g) 9.6   10.0
Suspension compliance Cms (mm/N)   0.58  
Effective cone diameter D (cm)   10.8  
Effective piston area Sd (cm²)   91  
Equivalent volume VAS (ltrs)   6.6  
Force factor Bl (N/A)   4.8  
Reference voltage sensitivity
Re 2.83V 1m at 307 Hz (Measured)
  (dB)     90.1
Magnet and voice coil parameters:    
Voice coil diameter d (mm) 26
Voice coil length h (mm) 10
Voice coil layers n   2
Flux density in gap B (T) 1.02
Total useful flux   (mWb) 0.70
Height of the gap hg (mm) 6
Diameter of magnet dm (mm) 81
Height of magnet hm (mm) 15
Weight of magnet   (kg) 0.32
Power handling:  
Long term Max System Power (IEC) (W) 110