Fostex FE166NV2

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93dB
• Frequency response 50 - 20000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 49.6Hz
• Mechanical quality factor QMS 7.88
• Electrical quality factor QES 0.28
• Total quality factor QTS 0.27

Large signal parameters

• Power handling P 22W
• Program power Pmax 65W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 7.8Ω
• Inductance (1kHz) LE 0.8mH
• VC Diameter 25mm

Magnet

• Force factor Bl 7.7N/A
• Motor constant Bl/√RE 2.76N/√W

Diaphragm

• Effective diameter 130mm
• Effective area SD 132cm²
• Moving mass MMS 7g
• Moving mass (without air load) MMD 5.9g

Suspensions

• Stiffness KMS 0.667N/mm
• Compliance CMS 1500µm/N
• Equivalent volume to the compliance VAS 36.9L
• Mechanical resistance RMS 0.28N·s/m

Dimensions

• Nominal diameter 6.5″
• 160mm
• Overall size 166 x 166mm
• Baffle cutout diameter 146mm
• Volume occupied by the driver (estimated) 0.65L
• Net weight 1.6kg