Fi Car Audio SSD12 D2

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.2dB

Thiele & Small parameters

• Resonance frequency (free air) fS 39.8Hz
• Mechanical quality factor QMS 5.49
• Electrical quality factor QES 0.40
• Total quality factor QTS 0.37

Large signal parameters

• Maximum linear excursion xmax 22mm
• Air volume displaced at xmax VD 1056cm³
• Power handling P 1250W
• Program power Pmax 2500W

Voice Coil

• Nominal impedance Z 2 x 2Ω
• DC resistance (in series) RE 3.0Ω
• Inductance (1kHz, in series, estimated) LE 3.06mH

Magnet

• Force factor (in series) Bl 24.3N/A
• Motor constant Bl/√RE 14N/√W

Diaphragm

• Effective diameter 247mm
• Effective area SD 480cm²
• Moving mass MMS 314g
• Moving mass (without air load) MMD 306g

Suspensions

• Stiffness KMS 20N/mm
• Compliance CMS 50µm/N
• Equivalent volume to the compliance VAS 16.5L
• Mechanical resistance RMS 14.3N·s/m

Dimensions

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