Fostex FE126NV2

• Sensitivity (1W, 1m, infinite baffle) SPL1W 92.2dB
• Frequency response 79 - 20000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 79.1Hz
• Mechanical quality factor QMS 3.51
• Electrical quality factor QES 0.37
• Total quality factor QTS 0.34

Large signal parameters

• Power handling P 15W
• Program power Pmax 45W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 7.1Ω
• Inductance (1kHz) LE 0.2mH
• VC Diameter 20mm

Magnet

• Force factor Bl 5.3N/A
• Motor constant Bl/√RE 1.99N/√W

Diaphragm

• Effective diameter 92mm
• Effective area SD 65.4cm²
• Moving mass MMS 3g
• Moving mass (without air load) MMD 2.6g

Suspensions

• Stiffness KMS 0.714N/mm
• Compliance CMS 1400µm/N
• Equivalent volume to the compliance VAS 8.5L
• Mechanical resistance RMS 0.42N·s/m

Dimensions

• Nominal diameter 4.5″
• 120mm
• Overall diameter 117mm
• Baffle cutout diameter 104mm
• Volume occupied by the driver (estimated) 0.4L
• Net weight 1.0kg