Fi Car Audio SSD15 D1

• Sensitivity (1W, 1m, infinite baffle) SPL1W 90dB

Thiele & Small parameters

• Resonance frequency (free air) fS 38.3Hz
• Mechanical quality factor QMS 6.05
• Electrical quality factor QES 0.42
• Total quality factor QTS 0.40

Large signal parameters

• Maximum linear excursion xmax 22mm
• Air volume displaced at xmax VD 1782cm³
• Power handling P 1250W
• Program power Pmax 2500W

Voice Coil

• Nominal impedance Z 2 x 1Ω
• DC resistance (in series) RE 1.5Ω
• Inductance (1kHz, in series, estimated) LE 0.74mH

Magnet

• Force factor (in series) Bl 17.1N/A
• Motor constant Bl/√RE 14N/√W

Diaphragm

• Effective diameter 321mm
• Effective area SD 810cm²
• Moving mass MMS 344g
• Moving mass (without air load) MMD 327g

Suspensions

• Stiffness KMS 19.6N/mm
• Compliance CMS 51µm/N
• Equivalent volume to the compliance VAS 47.1L
• Mechanical resistance RMS 13.7N·s/m

Dimensions

• Nominal diameter 15″
• 397mm
• Overall diameter 397mm
• Baffle cutout diameter 359mm
• Mounting depth 203mm
• Volume occupied by the driver 4.81L