Eminence NSW4018-8

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.5dB
• Frequency response 27 - 1300Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 36Hz
• Mechanical quality factor QMS 8.46
• Electrical quality factor QES 0.39
• Total quality factor QTS 0.38

Large signal parameters

• Maximum linear excursion xmax 15.2mm
• Maximum excursion before damage xlim 31.5mm
• Air volume displaced at xmax VD 1851cm³
• Power handling P 1600W
• Program power Pmax 3200W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.9Ω
• Inductance (1kHz) LE 1.54mH
• VC Diameter 101.6mm
• Winding material Copper
• Former material Glass Fiber

Magnet

• Force factor Bl 28.2N/A
• Motor constant Bl/√RE 11.7N/√W
• Air gap height HAG 12.7mm
• Weight 0.936kg
• Material Neodymium

Diaphragm

• Effective diameter 394mm
• Effective area SD 1217cm²
• Moving mass MMS 237g
• Moving mass (without air load) MMD 208g
• Material X5 pulp

Suspensions

• Stiffness KMS 12.5N/mm
• Compliance CMS 80µm/N
• Equivalent volume to the compliance VAS 164L
• Mechanical resistance RMS 6.34N·s/m
• Surround material Advanced Polycotton

Dimensions

• Nominal diameter 18″
• 457mm
• Overall diameter 461mm
• Baffle cutout diameter 422mm
• Overall depth 226mm
• Volume occupied by the driver 5.8L
• Net weight 9.48kg
• Frame material Die-cast Aluminium