Eighteen Sound 12MB700

• Sensitivity (1W, 1m, infinite baffle) SPL1W 98.7dB
• Frequency response 60 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 49Hz
• Mechanical quality factor QMS 4.70
• Electrical quality factor QES 0.20
• Total quality factor QTS 0.19

Large signal parameters

• Maximum linear excursion xmax 4.5mm
• Air volume displaced at xmax VD 239cm³
• Power handling P 450W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.0Ω
• Inductance (1kHz) LE 0.9mH
• VC Diameter 75mm
• Winding material Aluminum

Magnet

• Force factor Bl 17.8N/A
• Motor constant Bl/√RE 7.96N/√W
• Material Ferrite

Diaphragm

• Effective diameter 260mm
• Effective area SD 531cm²
• Moving mass MMS 41g
• Moving mass (without air load) MMD 32.2g
• Material Weather protected

Suspensions

• Stiffness KMS 3.89N/mm
• Compliance CMS 257µm/N
• Equivalent volume to the compliance VAS 101L
• Mechanical resistance RMS 2.69N·s/m

Dimensions

• Nominal diameter 12″
• 300mm
• Overall diameter 315mm
• Baffle cutout diameter 282mm
• Overall depth 147mm
• Flange thickness 16mm
• Mounting depth 131mm
• Volume occupied by the driver (estimated) 3.4L
• Net weight 8.3kg