Fostex FE168NS

• Sensitivity (1W, 1m, infinite baffle) SPL1W 92.6dB
• Frequency response 60 - 20000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 60Hz
• Mechanical quality factor QMS 7.30
• Electrical quality factor QES 0.40
• Total quality factor QTS 0.39

Large signal parameters

• Maximum linear excursion xmax 2.2mm
• Air volume displaced at xmax VD 28cm³
• Power handling P 20W
• Program power Pmax 60W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 7.1Ω
• Inductance (1kHz) LE 0.18mH
• VC Diameter 25mm

Magnet

• Force factor Bl 7.4N/A
• Motor constant Bl/√RE 2.78N/√W
• Diameter 120mm
• Weight 0.72kg
• Material Ferrite

Diaphragm

• Effective diameter 128mm
• Effective area SD 129cm²
• Moving mass MMS 8.5g
• Moving mass (without air load) MMD 7.3g

Suspensions

• Stiffness KMS 1.21N/mm
• Compliance CMS 830µm/N
• Equivalent volume to the compliance VAS 19.5L
• Mechanical resistance RMS 0.44N·s/m

Dimensions

• Nominal diameter 6.3″
• 160mm
• Overall diameter 190mm
• Baffle cutout diameter 151mm
• Overall depth 85mm
• Flange thickness 13mm
• Mounting depth 72mm
• Volume occupied by the driver (estimated) 0.74L
• Net weight 2.28kg