Fostex FE83En

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.2dB
• Frequency response 165 - 30000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 165Hz
• Mechanical quality factor QMS 4.06
• Electrical quality factor QES 1.06
• Total quality factor QTS 0.84

Large signal parameters

• Maximum linear excursion xmax 0.2mm
• Air volume displaced at xmax VD 0.4cm³
• Power handling P 5W
• Program power Pmax 7W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 7.5Ω
• Inductance (1kHz) LE 0.027mH
• VC Diameter 16mm

Magnet

• Force factor Bl 3.35N/A
• Motor constant Bl/√RE 1.22N/√W
• Weight 0.14kg
• Material Ferrite

Diaphragm

• Effective diameter 60mm
• Effective area SD 28.3cm²
• Moving mass MMS 1.53g
• Moving mass (without air load) MMD 1.4g

Suspensions

• Stiffness KMS 1.61N/mm
• Compliance CMS 622µm/N
• Equivalent volume to the compliance VAS 0.7L
• Mechanical resistance RMS 0.39N·s/m

Dimensions

• Nominal diameter 3″
• 80mm
• Overall diameter 83mm
• Baffle cutout diameter 73mm
• Overall depth 44mm
• Volume occupied by the driver (estimated) 0.12L
• Net weight 0.35kg