Eighteen Sound 8NMB750 16Ω

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.2dB
• Frequency response 56 - 7000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 91Hz
• Mechanical quality factor QMS 5.90
• Electrical quality factor QES 0.39
• Total quality factor QTS 0.37

Large signal parameters

• Maximum linear excursion xmax 6.3mm
• Air volume displaced at xmax VD 145cm³
• Power handling P 350W
• Program power Pmax 700W

Voice Coil

• Nominal impedance Z 16Ω
• DC resistance RE 10.2Ω
• Inductance (1kHz) LE 0.3mH
• VC Diameter 75mm

Magnet

• Force factor Bl 21.5N/A
• Motor constant Bl/√RE 6.73N/√W
• Material Neodymium

Diaphragm

• Effective diameter 171mm
• Effective area SD 230cm²
• Moving mass MMS 30g
• Moving mass (without air load) MMD 27.3g
• Material Water,UV repellent

Suspensions

• Stiffness KMS 9.8N/mm
• Compliance CMS 102µm/N
• Equivalent volume to the compliance VAS 7.3L
• Mechanical resistance RMS 2.91N·s/m

Dimensions

• Nominal diameter 8″
• 225mm
• Overall diameter 225mm
• Baffle cutout diameter 186mm
• Overall depth 105mm
• Flange thickness 11mm
• Mounting depth 94mm
• Volume occupied by the driver (estimated) 1.2L
• Net weight 3.5kg