Eighteen Sound 18TLW3000 8Ω

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.4dB
• Frequency response 30 - 2000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 33Hz
• Mechanical quality factor QMS 13.00
• Electrical quality factor QES 0.42
• Total quality factor QTS 0.41

Large signal parameters

• Maximum linear excursion xmax 12mm
• Air volume displaced at xmax VD 1470cm³
• Power handling P 1800W
• Program power Pmax 3600W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 4.6Ω
• Inductance (1kHz) LE 1.8mH
• VC Diameter 100mm
• Winding material Copper

Magnet

• Force factor Bl 24.5N/A
• Motor constant Bl/√RE 11.4N/√W
• Material Ferrite

Diaphragm

• Effective diameter 395mm
• Effective area SD 1225cm²
• Moving mass MMS 266g
• Moving mass (without air load) MMD 236g
• Material Water,UV repellent

Suspensions

• Stiffness KMS 11.5N/mm
• Compliance CMS 87µm/N
• Equivalent volume to the compliance VAS 185L
• Mechanical resistance RMS 4.24N·s/m

Dimensions

• Nominal diameter 18″
• 460mm
• Overall diameter 462mm
• Baffle cutout diameter 416mm
• Overall depth 275mm
• Flange thickness 24mm
• Mounting depth 251mm
• Volume occupied by the driver (estimated) 8.6L
• Net weight 13.2kg