SB Acoustics SB15SFCR39-8

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.8dB

Thiele & Small parameters

• Resonance frequency (free air) fS 32Hz
• Mechanical quality factor QMS 7.11
• Electrical quality factor QES 0.45
• Total quality factor QTS 0.42

Large signal parameters

• Maximum linear excursion xmax 5mm
• Air volume displaced at xmax VD 89cm³
• Power handling P 80W
• Program power Pmax 160W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.2Ω
• Inductance (1kHz) LE 1.3mH
• VC Diameter 38.5mm
• Winding height HVC 16mm

Magnet

• Flux density B 0.94T
• Force factor Bl 8N/A
• Motor constant Bl/√RE 3.21N/√W
• Air gap height HAG 6mm
• Weight 0.54kg

Diaphragm

• Effective diameter 151mm
• Effective area SD 178cm²
• Moving mass MMS 23g
• Moving mass (without air load) MMD 22.1g
• Material Paper

Suspensions

• Stiffness KMS 0.926N/mm
• Compliance CMS 1080µm/N
• Equivalent volume to the compliance VAS 48.3L
• Mechanical resistance RMS 0.65N·s/m
• Surround material Rubber

Dimensions

• Nominal size 5 x 8″
• 127 x 203mm
• Volume occupied by the driver (estimated) 0.67L
• Net weight 1.65kg