Eighteen Sound 10MB400

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97.1dB
• Frequency response 65 - 6100Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 70Hz
• Mechanical quality factor QMS 3.50
• Electrical quality factor QES 0.37
• Total quality factor QTS 0.33

Large signal parameters

• Maximum linear excursion xmax 2.5mm
• Air volume displaced at xmax VD 88cm³
• Power handling P 250W
• Program power Pmax 320W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.1Ω
• Inductance (1kHz) LE 1.05mH
• VC Diameter 50mm
• Winding material Copper

Magnet

• Force factor Bl 12N/A
• Motor constant Bl/√RE 5.31N/√W

Diaphragm

• Effective diameter 211mm
• Effective area SD 350cm²
• Moving mass MMS 21g
• Moving mass (without air load) MMD 16.3g
• Material Weather protected

Suspensions

• Stiffness KMS 4.07N/mm
• Compliance CMS 246µm/N
• Equivalent volume to the compliance VAS 41L
• Mechanical resistance RMS 2.64N·s/m

Dimensions

• Nominal diameter 10″
• 260mm
• Overall diameter 260mm
• Baffle cutout diameter 232mm
• Overall depth 121mm
• Flange thickness 14mm
• Mounting depth 107mm
• Volume occupied by the driver (estimated) 1.8L
• Net weight 4.7kg