Fi Car Audio BTL3 12 D2

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.4dB

Thiele & Small parameters

• Resonance frequency (free air) fS 33.9Hz
• Mechanical quality factor QMS 6.11
• Electrical quality factor QES 0.27
• Total quality factor QTS 0.26

Large signal parameters

• Maximum linear excursion xmax 34mm
• Air volume displaced at xmax VD 1632cm³
• Power handling P 2500W
• Program power Pmax 5000W

Voice Coil

• Nominal impedance Z 2 x 2Ω
• DC resistance (in series) RE 3.6Ω
• Inductance (1kHz, in series, estimated) LE 3.41mH

Magnet

• Force factor (in series) Bl 28.2N/A
• Motor constant Bl/√RE 14.9N/√W

Diaphragm

• Effective diameter 247mm
• Effective area SD 480cm²
• Moving mass MMS 282g
• Moving mass (without air load) MMD 274g

Suspensions

• Stiffness KMS 12N/mm
• Compliance CMS 83.1µm/N
• Equivalent volume to the compliance VAS 24.8L
• Mechanical resistance RMS 9.83N·s/m

Dimensions

• Nominal diameter 12″
• 318mm
• Overall diameter 318mm
• Baffle cutout diameter 283mm
• Mounting depth 184mm
• Volume occupied by the driver 2.27L