Eighteen Sound 12MB1000

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97.9dB
• Frequency response 80 - 3500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 54Hz
• Mechanical quality factor QMS 6.00
• Electrical quality factor QES 0.20
• Total quality factor QTS 0.18

Large signal parameters

• Maximum linear excursion xmax 2.5mm
• Air volume displaced at xmax VD 133cm³
• Power handling P 600W
• Program power Pmax 800W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.8Ω
• Inductance (1kHz) LE 1.46mH
• VC Diameter 100mm

Magnet

• Force factor Bl 23.5N/A
• Motor constant Bl/√RE 9.76N/√W

Diaphragm

• Effective diameter 260mm
• Effective area SD 531cm²
• Moving mass MMS 55.5g
• Moving mass (without air load) MMD 46.7g

Suspensions

• Stiffness KMS 6.37N/mm
• Compliance CMS 157µm/N
• Equivalent volume to the compliance VAS 60L
• Mechanical resistance RMS 3.14N·s/m

Dimensions

• Nominal diameter 12″
• 315mm
• Overall diameter 315mm
• Baffle cutout diameter 282mm
• Overall depth 118mm
• Flange thickness 16mm
• Mounting depth 102mm
• Volume occupied by the driver (estimated) 3.2L
• Net weight 9.6kg