Fi Car Audio TEAM 4 12 D1

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.1dB

Thiele & Small parameters

• Resonance frequency (free air) fS 34.3Hz
• Mechanical quality factor QMS 7.93
• Electrical quality factor QES 0.36
• Total quality factor QTS 0.35

Large signal parameters

• Maximum linear excursion xmax 33mm
• Air volume displaced at xmax VD 1584cm³
• Power handling P 4500W
• Program power Pmax 9000W

Voice Coil

• Nominal impedance Z 2 x 1Ω
• DC resistance (in series) RE 1.5Ω
• Inductance (1kHz, in series, estimated) LE 1.82mH

Magnet

• Force factor (in series) Bl 19N/A
• Motor constant Bl/√RE 15.5N/√W

Diaphragm

• Effective diameter 247mm
• Effective area SD 480cm²
• Moving mass MMS 408g
• Moving mass (without air load) MMD 400g

Suspensions

• Stiffness KMS 18.9N/mm
• Compliance CMS 53µm/N
• Equivalent volume to the compliance VAS 17.2L
• Mechanical resistance RMS 11.1N·s/m

Dimensions

• Nominal diameter 12″
• 318mm
• Overall diameter 318mm
• Baffle cutout diameter 283mm
• Mounting depth 254mm
• Volume occupied by the driver 5.38L