SB Acoustics SW26SFC38-4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 89.2dB

Thiele & Small parameters

• Resonance frequency (free air) fS 27Hz
• Mechanical quality factor QMS 4.94
• Electrical quality factor QES 0.30
• Total quality factor QTS 0.29

Large signal parameters

• Maximum linear excursion xmax 3.5mm
• Air volume displaced at xmax VD 119cm³
• Power handling P 80W
• Program power Pmax 160W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.5Ω
• Inductance (1kHz) LE 1.27mH
• VC Diameter 38.5mm
• Winding height HVC 16mm
• Former material Glass Fiber

Magnet

• Flux density B 0.72T
• Force factor Bl 11.2N/A
• Motor constant Bl/√RE 5.99N/√W
• Air gap height HAG 9mm
• Weight 0.1kg
• Material Neodymium

Diaphragm

• Effective diameter 208mm
• Effective area SD 340cm²
• Moving mass MMS 64g
• Moving mass (without air load) MMD 59.5g
• Material Paper

Suspensions

• Stiffness KMS 1.85N/mm
• Compliance CMS 540µm/N
• Equivalent volume to the compliance VAS 88L
• Mechanical resistance RMS 2.2N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 10″
• 254mm
• Volume occupied by the driver (estimated) 0.37L
• Net weight 0.94kg