Fostex FE206En

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97.8dB
• Frequency response 45 - 20000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 45Hz
• Mechanical quality factor QMS 4.57
• Electrical quality factor QES 0.19
• Total quality factor QTS 0.19

Large signal parameters

• Maximum linear excursion xmax 0.8mm
• Air volume displaced at xmax VD 17cm³
• Power handling P 30W
• Program power Pmax 90W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.8Ω
• Inductance (1kHz) LE 0.053mH

Magnet

• Force factor Bl 10.7N/A
• Motor constant Bl/√RE 4.08N/√W
• Weight 1.067kg
• Material Ferrite

Diaphragm

• Effective diameter 162mm
• Effective area SD 206cm²
• Moving mass MMS 12.2g
• Moving mass (without air load) MMD 10g

Suspensions

• Stiffness KMS 0.853N/mm
• Compliance CMS 1172µm/N
• Equivalent volume to the compliance VAS 71L
• Mechanical resistance RMS 0.75N·s/m

Dimensions

• Nominal diameter 8″
• 200mm
• Overall diameter 208mm
• Baffle cutout diameter 185mm
• Overall depth 88mm
• Volume occupied by the driver (estimated) 1L
• Net weight 3.2kg