Eighteen Sound 8NTLS2000

16Ω

Subwoofer

Nominal diameter8″ / 210 mm
Resonance40 Hz
Q factor0.19
Sensitivity91.2 dB
Linear excursion± 7.4 mm
Program Power700 W
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply

Specifications

  • 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 (one way) 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
Eighteen Sound 8NTLS2000 Impedance
Eighteen Sound 8NTLS2000 SPL
Eighteen Sound 8NTLS2000 Dimensions

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