Eighteen Sound 18W1300

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97dB
• Frequency response 38 - 3300Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 35Hz
• Mechanical quality factor QMS 5.00
• Electrical quality factor QES 0.35
• Total quality factor QTS 0.33

Large signal parameters

• Maximum linear excursion xmax 8.5mm
• Air volume displaced at xmax VD 1041cm³
• Power handling P 850W
• Program power Pmax 1200W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.0Ω
• Inductance (1kHz) LE 1.48mH
• VC Diameter 100mm
• Winding material Aluminum

Magnet

• Force factor Bl 20.4N/A
• Motor constant Bl/√RE 9.12N/√W
• Material Ferrite

Diaphragm

• Effective diameter 395mm
• Effective area SD 1225cm²
• Moving mass MMS 129g
• Moving mass (without air load) MMD 99.3g
• Material Weather protected

Suspensions

• Stiffness KMS 6.25N/mm
• Compliance CMS 160µm/N
• Equivalent volume to the compliance VAS 336L
• Mechanical resistance RMS 5.67N·s/m
• Spider material Double Silicon

Dimensions

• Nominal diameter 18″
• 460mm
• Overall diameter 462mm
• Baffle cutout diameter 416mm
• Overall depth 211mm
• Flange thickness 26mm
• Mounting depth 185mm
• Volume occupied by the driver (estimated) 7.2L
• Net weight 13.0kg