Fostex FW800HS

• Sensitivity (1W, 1m, infinite baffle) SPL1W 98.4dB
• Frequency response 25 - 1500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 25Hz
• Mechanical quality factor QMS 19.22
• Electrical quality factor QES 0.71
• Total quality factor QTS 0.69

Large signal parameters

• Maximum linear excursion xmax 2.3mm
• Air volume displaced at xmax VD 924cm³
• Power handling P 150W
• Program power Pmax 450W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.6Ω
• Inductance (1kHz) LE 0.163mH
• VC Diameter 99.2mm

Magnet

• Force factor Bl 30.3N/A
• Motor constant Bl/√RE 11.8N/√W
• Weight 2.03kg
• Material Ferrite

Diaphragm

• Effective diameter 715mm
• Effective area SD 4015cm²
• Moving mass MMS 692g
• Moving mass (without air load) MMD 523g

Suspensions

• Stiffness KMS 15.5N/mm
• Compliance CMS 64.4µm/N
• Equivalent volume to the compliance VAS 1473L
• Mechanical resistance RMS 5.66N·s/m

Dimensions

• Nominal diameter 31.5″
• 800mm
• Overall diameter 800mm
• Baffle cutout diameter 750mm
• Overall depth 291mm
• Volume occupied by the driver (estimated) 17L
• Net weight 20.7kg