Skar Audio TXL-18 D1

2x1Ω
2x2Ω

Subwoofer

Nominal diameter18″ / 457 mm
Resonance40.7 Hz
Q factor0.67
Sensitivity91.2 dB
Linear excursion± 17 mm
Program power5000 W
Discontinued
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 15 - 250Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 40.7Hz
  • Mechanical quality factor QMS 6.33
  • Electrical quality factor QES 0.75
  • Total quality factor QTS 0.67

Large signal parameters

  • Maximum linear excursion (one way) xmax 17mm
  • Air volume displaced at xmax VD 2089cm³
  • Power handling P 2500W
  • Program power Pmax 5000W

Voice Coil

  • Nominal impedance Z 2 x 1Ω
  • DC resistance (in series) RE 2.0Ω
  • Inductance (1kHz, in series, estimated) LE 2.37mH
  • VC Diameter 89mm

Magnet

  • Force factor (in series) Bl 16.4N/A
  • Motor constant Bl/√RE 11.6N/√W
  • Diameter 267mm

Diaphragm

  • Effective diameter 396mm
  • Effective area SD 1229cm²
  • Moving mass (including air load) MMS 394g
  • Moving mass MMD 365g

Suspensions

  • Stiffness KMS 25N/mm
  • Compliance CMS 40µm/N
  • Equivalent volume to the compliance VAS 85.7L
  • Mechanical resistance RMS 15.9N·s/m

Dimensions

  • Nominal diameter 18
  • 457mm
  • Baffle cutout diameter 435mm
  • Mounting depth 235mm
  • Volume occupied by the driver 5.1L

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