Skar Audio DDX-15 D2

2x2Ω
2x4Ω

Subwoofer

Nominal diameter15″ / 381 mm
Resonance33.6 Hz
Q factor0.39
Sensitivity89.7 dB
Linear excursion± 15 mm
Program Power1500 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
  • Sensitivity (1W, 1m, infinite baffle) SPL1W 89.7dB

Thiele & Small parameters

  • Resonance frequency (free air) fS 33.6Hz
  • Mechanical quality factor QMS 4.20
  • Electrical quality factor QES 0.44
  • Total quality factor QTS 0.39

Large signal parameters

  • Maximum linear excursion xmax 15mm
  • Air volume displaced at xmax VD 1206cm³
  • Power handling P 1000W
  • Program power Pmax 1500W

Voice Coil

  • Nominal impedance Z 2 x 2Ω
  • DC resistance (in series) RE 4.9Ω
  • Inductance (1kHz, in series, estimated) LE 4.77mH
  • VC Diameter 63.5mm
  • Winding material Copper

Magnet

  • Force factor (in series) Bl 26.3N/A
  • Motor constant Bl/√RE 11.9N/√W
  • Diameter 193mm

Diaphragm

  • Effective diameter 320mm
  • Effective area SD 804cm²
  • Moving mass MMS 293g
  • Moving mass (without air load) MMD 277g
  • Material Pressed Paper

Suspensions

  • Stiffness KMS 19.6N/mm
  • Compliance CMS 51µm/N
  • Equivalent volume to the compliance VAS 46.7L
  • Mechanical resistance RMS 14.7N·s/m
  • Surround material Foam

Dimensions

  • Nominal diameter 15
  • 381mm
  • Baffle cutout diameter 358mm
  • Overall depth 224mm
  • Flange thickness 29mm
  • Mounting depth 195mm
  • Volume occupied by the driver (estimated) 7.5L


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