Fostex FW208HS

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.6dB
• Frequency response 32 - 7000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 32Hz
• Mechanical quality factor QMS 12.93
• Electrical quality factor QES 0.42
• Total quality factor QTS 0.40

Large signal parameters

• Maximum linear excursion xmax 8.8mm
• Air volume displaced at xmax VD 181cm³
• Power handling P 50W
• Program power Pmax 100W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.5Ω
• Inductance (1kHz) LE 0.427mH
• VC Diameter 65mm

Magnet

• Force factor Bl 10.6N/A
• Motor constant Bl/√RE 4.14N/√W
• Weight 1.41kg
• Material Ferrite

Diaphragm

• Effective diameter 162mm
• Effective area SD 206cm²
• Moving mass MMS 37g
• Moving mass (without air load) MMD 34.6g

Suspensions

• Stiffness KMS 0.995N/mm
• Compliance CMS 1005µm/N
• Equivalent volume to the compliance VAS 42.7L
• Mechanical resistance RMS 0.58N·s/m

Dimensions

• Nominal diameter 8″
• 200mm
• Overall diameter 230mm
• Baffle cutout diameter 185mm
• Overall depth 109mm
• Volume occupied by the driver (estimated) 1.5L
• Net weight 4.62kg