Eighteen Sound 12LW1400

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.4dB
• Frequency response 51 - 4000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 45Hz
• Mechanical quality factor QMS 5.00
• Electrical quality factor QES 0.32
• Total quality factor QTS 0.30

Large signal parameters

• Maximum linear excursion xmax 8.3mm
• Air volume displaced at xmax VD 438cm³
• Power handling P 900W
• Program power Pmax 1400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.2Ω
• Inductance (1kHz) LE 1.5mH
• VC Diameter 100mm
• Winding material Aluminum

Magnet

• Force factor Bl 20N/A
• Motor constant Bl/√RE 8.77N/√W
• Material Ferrite

Diaphragm

• Effective diameter 260mm
• Effective area SD 531cm²
• Moving mass MMS 88g
• Moving mass (without air load) MMD 79.2g
• Material Weather protected

Suspensions

• Stiffness KMS 7.04N/mm
• Compliance CMS 142µm/N
• Equivalent volume to the compliance VAS 55L
• Mechanical resistance RMS 4.98N·s/m

Dimensions

• Nominal diameter 12″
• 300mm
• Overall diameter 315mm
• Baffle cutout diameter 282mm
• Overall depth 141mm
• Flange thickness 17mm
• Mounting depth 124mm
• Volume occupied by the driver (estimated) 3.9L
• Net weight 10.9kg