Skar Audio VD-15 D4

2x2Ω
2x4Ω

Subwoofer

Nominal diameter15″ / 381 mm
Resonance40.7 Hz
Q factor0.85
Sensitivity88 dB
Linear excursion± 11 mm
Program power800 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 88dB

Thiele & Small parameters

  • Resonance frequency (free air) fS 40.7Hz
  • Mechanical quality factor QMS 5.05
  • Electrical quality factor QES 0.91
  • Total quality factor QTS 0.85

Large signal parameters

  • Maximum linear excursion (one way) xmax 11mm
  • Air volume displaced at xmax VD 894cm³
  • Power handling P 500W
  • Program power Pmax 800W

Voice Coil

  • Nominal impedance Z 2 x 4Ω
  • DC resistance (in series) RE 7.1Ω
  • Inductance (1kHz, in series, estimated) LE 6.29mH
  • VC Diameter 51mm

Magnet

  • Force factor (in series) Bl 20.1N/A
  • Motor constant Bl/√RE 7.54N/√W
  • Diameter 160mm

Diaphragm

  • Effective diameter 322mm
  • Effective area SD 813cm²
  • Moving mass (including air load) MMS 255g
  • Moving mass MMD 239g

Suspensions

  • Stiffness KMS 16.7N/mm
  • Compliance CMS 60µm/N
  • Equivalent volume to the compliance VAS 56.2L
  • Mechanical resistance RMS 12.9N·s/m

Dimensions

  • Nominal diameter 15
  • 381mm
  • Baffle cutout diameter 353mm
  • Mounting depth 176mm
  • Volume occupied by the driver 3.7L

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