Eighteen Sound 8MB500 16Ω

• Sensitivity (1W, 1m, infinite baffle) SPL1W 92.9dB
• Frequency response 60 - 4500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 73Hz
• Mechanical quality factor QMS 3.44
• Electrical quality factor QES 0.58
• Total quality factor QTS 0.50

Large signal parameters

• Maximum linear excursion xmax 6mm
• Air volume displaced at xmax VD 138cm³
• Power handling P 280W
• Program power Pmax 400W

Voice Coil

• Nominal impedance Z 16Ω
• DC resistance RE 9.8Ω
• Inductance (1kHz) LE 0.86mH
• VC Diameter 51mm
• Winding material Aluminum

Magnet

• Force factor Bl 11N/A
• Motor constant Bl/√RE 3.51N/√W

Diaphragm

• Effective diameter 171mm
• Effective area SD 230cm²
• Moving mass MMS 16g
• Moving mass (without air load) MMD 13.5g
• Material Weather protected

Suspensions

• Stiffness KMS 3.37N/mm
• Compliance CMS 297µm/N
• Equivalent volume to the compliance VAS 21.3L
• Mechanical resistance RMS 2.13N·s/m

Dimensions

• Nominal diameter 8″
• 200mm
• Overall diameter 210mm
• Baffle cutout diameter 186mm
• Overall depth 99mm
• Flange thickness 14mm
• Mounting depth 85mm
• Volume occupied by the driver (estimated) 1.1L
• Net weight 3.4kg