Fi Car Audio BL-NEO 18 D1

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.7dB

Thiele & Small parameters

• Resonance frequency (free air) fS 33.6Hz
• Mechanical quality factor QMS 8.21
• Electrical quality factor QES 0.42
• Total quality factor QTS 0.40

Large signal parameters

• Maximum linear excursion xmax 24mm
• Air volume displaced at xmax VD 2904cm³
• Power handling P 1750W
• Program power Pmax 3500W

Voice Coil

• Nominal impedance Z 2 x 1Ω
• DC resistance (in series) RE 1.4Ω
• Inductance (1kHz, in series, estimated) LE 1.5mH

Magnet

• Force factor (in series) Bl 17.5N/A
• Motor constant Bl/√RE 14.8N/√W

Diaphragm

• Effective diameter 393mm
• Effective area SD 1210cm²
• Moving mass MMS 338g
• Moving mass (without air load) MMD 308g

Suspensions

• Stiffness KMS 14.3N/mm
• Compliance CMS 69.9µm/N
• Equivalent volume to the compliance VAS 136L
• Mechanical resistance RMS 8.69N·s/m

Dimensions

• Nominal diameter 18″
• 470mm
• Overall diameter 470mm
• Baffle cutout diameter 425mm
• Mounting depth 248mm
• Volume occupied by the driver 7.36L