Fi Car Audio SSD NEO 18 D2

• Sensitivity (1W, 1m, infinite baffle) SPL1W 92.2dB

Thiele & Small parameters

• Resonance frequency (free air) fS 35.7Hz
• Mechanical quality factor QMS 7.73
• Electrical quality factor QES 0.57
• Total quality factor QTS 0.53

Large signal parameters

• Maximum linear excursion xmax 28mm
• Air volume displaced at xmax VD 3388cm³
• Power handling P 1750W
• Program power Pmax 3500W

Voice Coil

• Nominal impedance Z 2 x 2Ω
• DC resistance (in series) RE 2.8Ω
• Inductance (1kHz, in series, estimated) LE 2.78mH

Magnet

• Force factor (in series) Bl 18.3N/A
• Motor constant Bl/√RE 10.9N/√W

Diaphragm

• Effective diameter 393mm
• Effective area SD 1210cm²
• Moving mass MMS 302g
• Moving mass (without air load) MMD 272g

Suspensions

• Stiffness KMS 15.9N/mm
• Compliance CMS 63µm/N
• Equivalent volume to the compliance VAS 131L
• Mechanical resistance RMS 8.76N·s/m

Dimensions

• Nominal diameter 18″
• 470mm
• Overall diameter 470mm
• Baffle cutout diameter 425mm
• Mounting depth 241mm
• Volume occupied by the driver 6.23L