Fi Car Audio Alpha v2.1 10 S4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 84.6dB

Thiele & Small parameters

• Resonance frequency (free air) fS 40.2Hz
• Mechanical quality factor QMS 7.06
• Electrical quality factor QES 0.51
• Total quality factor QTS 0.49

Large signal parameters

• Maximum linear excursion xmax 17mm
• Air volume displaced at xmax VD 527cm³
• Power handling P 750W
• Program power Pmax 1500W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.2Ω
• Inductance (1kHz, estimated) LE 2.05mH

Magnet

• Force factor Bl 15.9N/A
• Motor constant Bl/√RE 8.89N/√W

Diaphragm

• Effective diameter 199mm
• Effective area SD 310cm²
• Moving mass MMS 156g
• Moving mass (without air load) MMD 152g

Suspensions

• Stiffness KMS 10.8N/mm
• Compliance CMS 92.2µm/N
• Equivalent volume to the compliance VAS 12.4L
• Mechanical resistance RMS 5.58N·s/m

Dimensions

• Nominal diameter 10″
• 279mm
• Overall diameter 279mm
• Baffle cutout diameter 235mm
• Mounting depth 165mm
• Volume occupied by the driver 3.96L