Eighteen Sound 8NW650 16Ω

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.9dB
• Frequency response 55 - 6300Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 62Hz
• Mechanical quality factor QMS 4.13
• Electrical quality factor QES 0.26
• Total quality factor QTS 0.25

Large signal parameters

• Maximum linear excursion xmax 5.5mm
• Air volume displaced at xmax VD 127cm³
• Power handling P 300W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 16Ω
• DC resistance RE 9.9Ω
• Inductance (1kHz) LE 1.14mH
• VC Diameter 65mm

Magnet

• Force factor Bl 19.1N/A
• Motor constant Bl/√RE 6.07N/√W
• Material Neodymium

Diaphragm

• Effective diameter 171mm
• Effective area SD 230cm²
• Moving mass MMS 25g
• Moving mass (without air load) MMD 22.5g
• Material Water,UV repellent

Suspensions

• Stiffness KMS 3.79N/mm
• Compliance CMS 264µm/N
• Equivalent volume to the compliance VAS 19L
• Mechanical resistance RMS 2.36N·s/m

Dimensions

• Nominal diameter 8″
• 200mm
• Overall diameter 210mm
• Baffle cutout diameter 185mm
• Overall depth 111mm
• Flange thickness 8mm
• Mounting depth 103mm
• Volume occupied by the driver (estimated) 0.97L
• Net weight 2.4kg