SB Acoustics SB15SFCR39-8 5x8'' Paper Cone Racetrack Woofer

SB Acoustics

SB Acoustics SB15SFCR39-8 5''X 8'' Paper Code Racetrack Woofer


Product Specifications
Nominal Impedance 8 ohms
DC resistence,Re 6.2 ohms
voice coil inductance,Le 1.3 mH
Free air resonance,Fs 31 Hz
Sensitivity(2.83V/1m) 87 dB
Mechanical Q-factor,Qms 6.46
Electrical Q-factor,Qes 0.46
Total Q-factor,Qts 0.42
Moving mass incl. air,Mms 23.2 g
Force factor,BI 7.9 Tm
Equivalent, Vas 51 lts
Compliance,Cms 1.13 mm/n
Mechanical loss, Rms 0.7 Kg/s
Rated power handling* 80 W
Effective piston area,Sd 178 cm²
Voice coil diameter 38.5 mm
Voice coil height 16 mm
Air gap height 6 mm
Linear coil travel(p-p) 10 mm
Magnetic flux density 0.86 T
Magnetic weight 0.54 Kg
Net weight 1.65 Kg

Suggested Box Alignments:

  • 0.5 - 0.7 cf sealed for an F3 of 58Hz
  • 0.7 cf with 2" dia. x 7" long port for an F3 of 42Hz
  • 1.0 cf with 2" dia. x 6" long port for an F3 of 39Hz
With Matching passive radiator
  • 0.6 cf for an F3 of 49Hz
  • 0.8 cf for an F3 of 45Hz
  • 1.0 cf for an F3 of 43Hz
  • 1.2 cf for an F3 of 42Hz

Frequency And Impedance Graph:

SB Acoustics SB15SFCR39-8 5x8'' Paper Cone Racetrack Woofer

Drawing:

SB Acoustics SB15SFCR39-8 5x8'' Paper Cone Racetrack Woofer