Fi Car Audio OMEGA 18 D1

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.1dB

Thiele & Small parameters

• Resonance frequency (free air) fS 37.5Hz
• Mechanical quality factor QMS 7.66
• Electrical quality factor QES 0.29
• Total quality factor QTS 0.28

Large signal parameters

• Maximum linear excursion xmax 34mm
• Air volume displaced at xmax VD 4114cm³
• Power handling P 4500W
• Program power Pmax 9000W

Voice Coil

• Nominal impedance Z 2 x 1Ω
• DC resistance (in series) RE 1.4Ω
• Inductance (1kHz, in series, estimated) LE 1.94mH

Magnet

• Force factor (in series) Bl 23.6N/A
• Motor constant Bl/√RE 19.9N/√W

Diaphragm

• Effective diameter 393mm
• Effective area SD 1210cm²
• Moving mass MMS 498g
• Moving mass (without air load) MMD 468g

Suspensions

• Stiffness KMS 27N/mm
• Compliance CMS 37µm/N
• Equivalent volume to the compliance VAS 76.2L
• Mechanical resistance RMS 15.3N·s/m

Dimensions

• Nominal diameter 18″
• 470mm
• Overall diameter 470mm
• Baffle cutout diameter 425mm
• Mounting depth 324mm
• Volume occupied by the driver 7.36L