Eighteen Sound 12LW801

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.2dB
• Frequency response 40 - 4000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 54Hz
• Mechanical quality factor QMS 9.00
• Electrical quality factor QES 0.34
• Total quality factor QTS 0.33

Large signal parameters

• Maximum linear excursion xmax 8mm
• Air volume displaced at xmax VD 425cm³
• Power handling P 500W
• Program power Pmax 800W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.0Ω
• Inductance (1kHz) LE 1.7mH
• VC Diameter 75mm
• Winding material Copper

Magnet

• Force factor Bl 20.3N/A
• Motor constant Bl/√RE 9.08N/√W
• Material Ferrite

Diaphragm

• Effective diameter 260mm
• Effective area SD 531cm²
• Moving mass MMS 84g
• Moving mass (without air load) MMD 75.2g
• Material Weather protected

Suspensions

• Stiffness KMS 9.71N/mm
• Compliance CMS 103µm/N
• Equivalent volume to the compliance VAS 41L
• Mechanical resistance RMS 3.17N·s/m

Dimensions

• Nominal diameter 12″
• 300mm
• Overall diameter 315mm
• Baffle cutout diameter 282mm
• Overall depth 159mm
• Flange thickness 20mm
• Mounting depth 139mm
• Volume occupied by the driver (estimated) 3.5L
• Net weight 8.1kg