Eighteen Sound 12ND710

• Sensitivity (1W, 1m, infinite baffle) SPL1W 98.9dB
• Frequency response 60 - 6000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 52Hz
• Mechanical quality factor QMS 6.00
• Electrical quality factor QES 0.20
• Total quality factor QTS 0.20

Large signal parameters

• Maximum linear excursion xmax 5mm
• Air volume displaced at xmax VD 265cm³
• Power handling P 450W
• Program power Pmax 700W

Voice Coil

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

Magnet

• Force factor Bl 18N/A
• Motor constant Bl/√RE 8.05N/√W
• Material Neodymium

Diaphragm

• Effective diameter 260mm
• Effective area SD 530cm²
• Moving mass MMS 40g
• Moving mass (without air load) MMD 31.3g

Suspensions

• Stiffness KMS 4.27N/mm
• Compliance CMS 234µm/N
• Equivalent volume to the compliance VAS 92L
• Mechanical resistance RMS 2.18N·s/m

Dimensions

• Nominal diameter 12″
• 300mm
• Overall diameter 315mm
• Baffle cutout diameter 282mm
• Overall depth 141mm
• Flange thickness 11mm
• Mounting depth 130mm
• Volume occupied by the driver (estimated) 2.2L
• Net weight 4.4kg