SB Acoustics SB12PFCR25-4 4'' Paper Cone Woofer

SB Acoustics

SB Acoustics SB12PFCR25-4 4'' Paper Cone Woofer


Product Specifications
Nominal Impedance 4 ohms
DC resistence,Re 3.1 ohms
voice coil inductance,Le 0.26 mH
Free air resonance,Fs 58 Hz
Sensitivity(2.83V/1m) 87.5 dB
Mechanical Q-factor,Qms 3.4
Electrical Q-factor,Qes 0.49
Total Q-factor,Qts 0.43
Moving mass incl. air,Mms 5.3 g
Force factor,BI 3.5 Tm
Equivalent volume,Vas 5.2 liters
Compliance,Cms 1.42 mm/N
Mechanical loss,Rms 0.6 Kg/s
Rated power handling* 30W
Effective piston area,Sd 50 cm²
Voice coil diameter 25.4 mm
Voice coil height 15 mm
Air gap height 5 mm
Linear coil travel(p-p) 10 mm
Magnetic flux density 0.84 T
Magnetic weight 0.32 Kg
Net weight 0.7 Kg

Frequency and Impedance Graph:

SB12PFCR25-4  graph

Drawing:

SB12PFCR25-4 Drawing