Eighteen Sound 8NMB750

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.1dB
• Frequency response 80 - 6000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 88Hz
• Mechanical quality factor QMS 6.10
• Electrical quality factor QES 0.28
• Total quality factor QTS 0.27

Large signal parameters

• Maximum linear excursion xmax 6.1mm
• Air volume displaced at xmax VD 140cm³
• Power handling P 350W
• Program power Pmax 700W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.2Ω
• Inductance (1kHz) LE 0.29mH
• VC Diameter 75mm
• Winding material Aluminum

Magnet

• Force factor Bl 18.7N/A
• Motor constant Bl/√RE 8.2N/√W
• Material Neodymium

Diaphragm

• Effective diameter 171mm
• Effective area SD 230cm²
• Moving mass MMS 35g
• Moving mass (without air load) MMD 32.3g
• Material Water,UV repellent

Suspensions

• Stiffness KMS 10.8N/mm
• Compliance CMS 93µm/N
• Equivalent volume to the compliance VAS 6.9L
• Mechanical resistance RMS 3.17N·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