Fi Car Audio IB312 v2 S4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 83.4dB

Thiele & Small parameters

• Resonance frequency (free air) fS 27.3Hz
• Mechanical quality factor QMS 7.65
• Electrical quality factor QES 0.73
• Total quality factor QTS 0.65

Large signal parameters

• Maximum linear excursion xmax 34mm
• Air volume displaced at xmax VD 1632cm³
• Power handling P 600W
• Program power Pmax 1200W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.6Ω
• Inductance (1kHz, estimated) LE 3.14mH

Magnet

• Force factor Bl 15N/A
• Motor constant Bl/√RE 7.91N/√W

Diaphragm

• Effective diameter 247mm
• Effective area SD 480cm²
• Moving mass MMS 249g
• Moving mass (without air load) MMD 241g

Suspensions

• Stiffness KMS 7.3N/mm
• Compliance CMS 137µm/N
• Equivalent volume to the compliance VAS 44.2L
• Mechanical resistance RMS 5.58N·s/m

Dimensions

• Nominal diameter 12″
• 318mm
• Overall diameter 318mm
• Baffle cutout diameter 283mm
• Mounting depth 165mm
• Volume occupied by the driver 3.96L