Eighteen Sound 18TLW3000

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94dB
• Frequency response 30 - 2000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 32Hz
• Mechanical quality factor QMS 13.80
• Electrical quality factor QES 0.36
• Total quality factor QTS 0.35

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 4Ω
• DC resistance RE 2.4Ω
• Inductance (1kHz) LE 1.2mH
• VC Diameter 100mm
• Winding material Copper

Magnet

• Force factor Bl 20N/A
• Motor constant Bl/√RE 12.9N/√W

Diaphragm

• Effective diameter 395mm
• Effective area SD 1225cm²
• Moving mass MMS 280g
• Moving mass (without air load) MMD 250g

Suspensions

• Stiffness KMS 11.4N/mm
• Compliance CMS 88µm/N
• Equivalent volume to the compliance VAS 185L
• Mechanical resistance RMS 4.08N·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