Fostex FE208-Sol

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97.7dB
• Frequency response 43 - 20000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 43Hz
• Mechanical quality factor QMS 6.70
• Electrical quality factor QES 0.15
• Total quality factor QTS 0.15

Large signal parameters

• Maximum linear excursion xmax 1.5mm
• Air volume displaced at xmax VD 30cm³
• Power handling P 35W
• Program power Pmax 100W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.4Ω
• Inductance (1kHz) LE 0.2mH
• VC Diameter 35.5mm

Magnet

• Force factor Bl 12.8N/A
• Motor constant Bl/√RE 5.06N/√W
• Weight 3.672kg

Diaphragm

• Effective diameter 162mm
• Effective area SD 206cm²
• Moving mass MMS 14.3g
• Moving mass (without air load) MMD 11.9g

Suspensions

• Stiffness KMS 1.08N/mm
• Compliance CMS 930µm/N
• Equivalent volume to the compliance VAS 56L
• Mechanical resistance RMS 0.58N·s/m

Dimensions

• Nominal diameter 8″
• 200mm
• Overall diameter 230mm
• Baffle cutout diameter 186mm
• Overall depth 110mm
• Volume occupied by the driver (estimated) 2.3L
• Net weight 8.7kg