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Eighteen Sound - A Division of AEB SRL - 12MB650
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12-inch High Sensitivity Mid-bass Driver

Model: 12MB650
  • 98 dB SPL 1W / 1m sensitivity
  • 65 mm (2.5 in) Edgewound Aluminum Voice coil (EWAL)
  • 800W program power handling
  • Improved heat dissipation via proprietary basket design
  • Weather protected cone and plates for outdoor usage
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The 12MB650 is a high sensitivity midbass driver with 800W program power handling capabilities. The 12MB650 can be used as either a bass/mid driver in compact 2-way reflex enclosures or in high quality stage monitor applications. Eighteen Sound engineers have obtained the best possible results with today's available materials in terms of clean and undistorted LF reproduction at a ultra high SPL, with the lowest possible power compression figure. Its curvilinear paper cone made from a special high strength wood pulp, has been designed to achieve the best possible linearity within its intended frequency range and to control bell-mode resonances around the cone circumference. The cone is carried by a triple roll suspension formed of a linen-like material, which is more resistant to aging and fatigue than traditional materials. The 65 mm (2.5 in) diameter state-of-the-art voice coil is made with edgewound aluminum wire winded over a high strength fiberglas former. This results in an extremely linear motor assembly with a reduced tendency for eccentric behavior when driven hard. Voice coil cooling has been achieved by incorporating airways between the chassis back plate and the top plate of the magnet, allowing heated air from the voice coil and gap to be channeled away and dissipated by the chassis basket. Special attention was given to the optimization of air flow into the gap without introducing audible noise. A special low-density material air diffractor placed into the heatsink acts as a cooling system, increasing the power handling capability and lowering the power compression figure. The magnetic structure has been optimized using FEA CAD resource, maximizing the flux density in the voice coil gap.
  • 98 dB SPL 1W / 1m sensitivity
  • 65 mm (2.5 in) Edgewound Aluminum Voice coil (EWAL)
  • 800W program power handling
  • Improved heat dissipation via proprietary basket design
  • Weather protected cone and plates for outdoor usage
  • Ideal for high quality two way and stage monitor applications
 
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