FaitalPRO 18FH500 4Ω

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96.1dB
• Frequency response 30 - 3150Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 28Hz
• Mechanical quality factor QMS 7.20
• Electrical quality factor QES 0.30
• Total quality factor QTS 0.29

Large signal parameters

• Maximum linear excursion xmax 9.5mm
• Maximum excursion before damage xlim 17.5mm
• Air volume displaced at xmax VD 1141cm³
• Power handling P 600W
• Program power Pmax 1200W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.3Ω
• Inductance (1kHz) LE 1.07mH
• VC Diameter 77mm
• Winding height HVC 22.4mm
• Winding material Copper
• Former material Glass Fiber

Magnet

• Flux density B 1.2T
• Force factor Bl 16.7N/A
• Motor constant Bl/√RE 9.19N/√W
• Air gap height HAG 10.5mm
• Material Neodymium Slug

Diaphragm

• Effective diameter 392mm
• Effective area SD 1207cm²
• Moving mass MMS 144g
• Moving mass (without air load) MMD 115g

Suspensions

• Stiffness KMS 4.55N/mm
• Compliance CMS 220µm/N
• Equivalent volume to the compliance VAS 457L
• Mechanical resistance RMS 3.5N·s/m

Dimensions

• Nominal diameter 18″
• 460mm
• Overall diameter 460mm
• Baffle cutout diameter 424mm
• Overall depth 202mm
• Flange thickness 14mm
• Mounting depth 188mm
• Volume occupied by the driver 5.7L
• Net weight 4.6kg
• Frame material Aluminium