Fi Car Audio BL12 D1

• Sensitivity (1W, 1m, infinite baffle) SPL1W 89.2dB

Thiele & Small parameters

• Resonance frequency (free air) fS 35.2Hz
• Mechanical quality factor QMS 4.68
• Electrical quality factor QES 0.25
• Total quality factor QTS 0.24

Large signal parameters

• Maximum linear excursion xmax 18mm
• Air volume displaced at xmax VD 864cm³
• Power handling P 1500W
• Program power Pmax 3000W

Voice Coil

• Nominal impedance Z 2 x 1Ω
• DC resistance (in series) RE 1.4Ω
• Inductance (1kHz, in series, estimated) LE 1.1mH

Magnet

• Force factor (in series) Bl 16.6N/A
• Motor constant Bl/√RE 14N/√W

Diaphragm

• Effective diameter 247mm
• Effective area SD 480cm²
• Moving mass MMS 212g
• Moving mass (without air load) MMD 204g

Suspensions

• Stiffness KMS 10.4N/mm
• Compliance CMS 96µm/N
• Equivalent volume to the compliance VAS 31.2L
• Mechanical resistance RMS 10N·s/m

Dimensions

• Nominal diameter 12″
• 318mm
• Overall diameter 318mm
• Baffle cutout diameter 283mm
• Mounting depth 171mm
• Volume occupied by the driver 5.1L