Eighteen Sound 8NTLS2000

• Sensitivity (1W, 1m, infinite baffle) SPL1W 91.2dB
• Frequency response 45 - 1200Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 40Hz
• Mechanical quality factor QMS 11.80
• Electrical quality factor QES 0.19
• Total quality factor QTS 0.19

Large signal parameters

• Maximum linear excursion xmax 7.4mm
• Air volume displaced at xmax VD 168cm³
• Power handling P 350W
• Program power Pmax 700W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.4Ω
• Inductance (1kHz) LE 0.69mH
• VC Diameter 51mm
• Winding height HVC 19mm

Magnet

• Force factor Bl 17.2N/A
• Motor constant Bl/√RE 7.4N/√W
• Air gap height HAG 8.5mm
• Material Neodymium

Diaphragm

• Effective diameter 170mm
• Effective area SD 227cm²
• Moving mass MMS 42g
• Moving mass (without air load) MMD 39.5g

Suspensions

• Stiffness KMS 2.65N/mm
• Compliance CMS 377µm/N
• Equivalent volume to the compliance VAS 27.5L
• Mechanical resistance RMS 0.89N·s/m

Dimensions

• Nominal diameter 8″
• 210mm
• Overall diameter 210mm
• Baffle cutout diameter 186mm
• Overall depth 121mm
• Flange thickness 9mm
• Mounting depth 112mm
• Volume occupied by the driver (estimated) 0.76L
• Net weight 1.5kg