DB Drive WDX15 7KD4

2x2Ω
2x4Ω

Subwoofer

Nominal diameter15″ / 381 mm
Resonance37.5 Hz
Q factor0.51
Sensitivity86.3 dB
Program Power7000 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
  • Sensitivity (1W, 1m, infinite baffle) SPL1W 86.3dB

Thiele & Small parameters

  • Resonance frequency (free air) fS 37.5Hz
  • Mechanical quality factor QMS 7.01
  • Electrical quality factor QES 0.55
  • Total quality factor QTS 0.51

Large signal parameters

  • Power handling P 3500W
  • Program power Pmax 7000W

Voice Coil

  • Nominal impedance Z 2 x 4Ω
  • DC resistance (in series) RE 6.8Ω
  • Inductance (1kHz, in series, estimated) LE 8.52mH

Magnet

  • Force factor (in series) Bl 31.1N/A
  • Motor constant Bl/√RE 11.9N/√W

Diaphragm

  • Effective diameter 315mm
  • Effective area SD 779cm²
  • Moving mass MMS 428g
  • Moving mass (without air load) MMD 413g

Suspensions

  • Stiffness KMS 20N/mm
  • Compliance CMS 49.9µm/N
  • Equivalent volume to the compliance VAS 42.9L
  • Mechanical resistance RMS 14.4N·s/m

Dimensions

  • Nominal diameter 15
  • 381mm
  • Volume occupied by the driver (estimated) 4.3L


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