Fostex FE208EΣ

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97.1dB
• Frequency response 42 - 14000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 42Hz
• Mechanical quality factor QMS 6.19
• Electrical quality factor QES 0.19
• Total quality factor QTS 0.18

Large signal parameters

• Maximum linear excursion xmax 1.3mm
• Air volume displaced at xmax VD 25cm³
• Power handling P 40W
• Program power Pmax 120W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.4Ω
• Inductance (1kHz) LE 0.052mH
• VC Diameter 35mm

Magnet

• Force factor Bl 10.8N/A
• Motor constant Bl/√RE 4.27N/√W
• Weight 1.409kg
• Material Ferrite

Diaphragm

• Effective diameter 160mm
• Effective area SD 201cm²
• Moving mass MMS 13.3g
• Moving mass (without air load) MMD 11g

Suspensions

• Stiffness KMS 0.935N/mm
• Compliance CMS 1069µm/N
• Equivalent volume to the compliance VAS 60.1L
• Mechanical resistance RMS 0.57N·s/m

Dimensions

• Nominal diameter 8″
• 200mm
• Overall diameter 230mm
• Baffle cutout diameter 185mm
• Overall depth 94mm
• Volume occupied by the driver (estimated) 1.4L
• Net weight 4.8kg