Fi Car Audio SP3 15 D2

• Sensitivity (1W, 1m, infinite baffle) SPL1W 89.6dB

Thiele & Small parameters

• Resonance frequency (free air) fS 32.4Hz
• Mechanical quality factor QMS 6.45
• Electrical quality factor QES 0.38
• Total quality factor QTS 0.36

Large signal parameters

• Maximum linear excursion xmax 34mm
• Air volume displaced at xmax VD 2754cm³
• 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 3.85mH

Magnet

• Force factor (in series) Bl 25.7N/A
• Motor constant Bl/√RE 13.5N/√W

Diaphragm

• Effective diameter 321mm
• Effective area SD 810cm²
• Moving mass MMS 338g
• Moving mass (without air load) MMD 321g

Suspensions

• Stiffness KMS 14.1N/mm
• Compliance CMS 71.1µm/N
• Equivalent volume to the compliance VAS 65.3L
• Mechanical resistance RMS 10.7N·s/m

Dimensions

• Nominal diameter 15″
• 397mm
• Overall diameter 397mm
• Baffle cutout diameter 359mm
• Mounting depth 279mm
• Volume occupied by the driver 5.95L