Eighteen Sound 12NW530

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.2dB
• Frequency response 48 - 3200Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 55Hz
• Mechanical quality factor QMS 9.70
• Electrical quality factor QES 0.38
• Total quality factor QTS 0.37

Large signal parameters

• Maximum linear excursion xmax 8mm
• Air volume displaced at xmax VD 424cm³
• Power handling P 500W
• Program power Pmax 800W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 4.9Ω
• Inductance (1kHz) LE 0.9mH
• VC Diameter 75mm
• Winding material Copper

Magnet

• Force factor Bl 19.7N/A
• Motor constant Bl/√RE 8.9N/√W
• Material Neodymium

Diaphragm

• Effective diameter 260mm
• Effective area SD 530cm²
• Moving mass MMS 93g
• Moving mass (without air load) MMD 84.3g
• Material Water,UV repellent

Suspensions

• Stiffness KMS 11.1N/mm
• Compliance CMS 90µm/N
• Equivalent volume to the compliance VAS 36L
• Mechanical resistance RMS 3.31N·s/m

Dimensions

• Nominal diameter 12″
• 300mm
• Overall diameter 315mm
• Baffle cutout diameter 282mm
• Overall depth 136mm
• Flange thickness 11mm
• Mounting depth 125mm
• Volume occupied by the driver (estimated) 2L
• Net weight 4.0kg