Eighteen Sound 18LW2400

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.4dB
• Frequency response 30 - 2500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 33Hz
• Mechanical quality factor QMS 6.40
• Electrical quality factor QES 0.33
• Total quality factor QTS 0.32

Large signal parameters

• Maximum linear excursion xmax 9.5mm
• Air volume displaced at xmax VD 1164cm³
• Power handling P 1200W
• Program power Pmax 2400W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 2.6Ω
• Inductance (1kHz) LE 0.9mH
• VC Diameter 100mm
• Winding material Copper

Magnet

• Force factor Bl 18N/A
• Motor constant Bl/√RE 11.2N/√W
• Material Ferrite

Diaphragm

• Effective diameter 395mm
• Effective area SD 1225cm²
• Moving mass MMS 200g
• Moving mass (without air load) MMD 170g
• Material Weather protected

Suspensions

• Stiffness KMS 8.62N/mm
• Compliance CMS 116µm/N
• Equivalent volume to the compliance VAS 235L
• Mechanical resistance RMS 6.48N·s/m

Dimensions

• Nominal diameter 18″
• 460mm
• Overall diameter 462mm
• Baffle cutout diameter 416mm
• Overall depth 214mm
• Flange thickness 24mm
• Mounting depth 190mm
• Volume occupied by the driver (estimated) 7.2L
• Net weight 12.75kg