SICA 18 F 3 CP

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.6dB
• Frequency response 30 - 700Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 30.8Hz
• Mechanical quality factor QMS 3.05
• Electrical quality factor QES 0.52
• Total quality factor QTS 0.45

Large signal parameters

• Maximum linear excursion xmax 6.5mm
• Air volume displaced at xmax VD 757cm³
• Power handling P 400W
• Program power Pmax 800W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.1Ω
• Inductance (1kHz) LE 1.41mH
• VC Diameter 75mm
• Winding height HVC 10mm
• Winding material Copper

Magnet

• Flux density B 1.08T
• Force factor Bl 16.9N/A
• Motor constant Bl/√RE 7.48N/√W
• Weight 1.8kg
• Material Ferrite

Diaphragm

• Effective diameter 385mm
• Effective area SD 1164cm²
• Moving mass MMS 155g
• Moving mass (without air load) MMD 127g
• Material Paper

Suspensions

• Stiffness KMS 5.65N/mm
• Compliance CMS 177µm/N
• Equivalent volume to the compliance VAS 340L
• Mechanical resistance RMS 9.83N·s/m
• Surround material Treated Cloth

Dimensions

• Nominal diameter 18″
• 462mm
• Overall diameter 462mm
• Baffle cutout diameter 417mm
• Overall depth 197mm
• Volume occupied by the driver (estimated) 5.3L
• Net weight 8.6kg
• Frame material Aluminium Die-Cast