DB Drive WDX12G3R.4

2x4Ω

Subwoofer

Nominal diameter12″ / 329 mm
Resonance30.2 Hz
Q factor0.64
Sensitivity82.7 dB
Linear excursion± 23 mm
Program Power4000 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 82.7dB

Thiele & Small parameters

  • Resonance frequency (free air) fS 30.2Hz
  • Mechanical quality factor QMS 3.38
  • Electrical quality factor QES 0.79
  • Total quality factor QTS 0.64

Large signal parameters

  • Maximum linear excursion (one way) xmax 23mm
  • Air volume displaced at xmax VD 1194cm³
  • Power handling P 2000W
  • Program power Pmax 4000W

Voice Coil

  • Nominal impedance Z 2 x 4Ω
  • DC resistance (in series) RE 6.4Ω
  • Inductance (1kHz, in series, estimated) LE 7.07mH
  • VC Diameter 76.2mm

Magnet

  • Force factor (in series) Bl 23.3N/A
  • Motor constant Bl/√RE 9.21N/√W

Diaphragm

  • Effective diameter 257mm
  • Effective area SD 519cm²
  • Moving mass MMS 355g
  • Moving mass (without air load) MMD 346g
  • Material Non-Pressed paper

Suspensions

  • Stiffness KMS 12.7N/mm
  • Compliance CMS 78.6µm/N
  • Equivalent volume to the compliance VAS 30L
  • Mechanical resistance RMS 19.9N·s/m
  • Surround material Double stitched reinforced foam
  • Spider material Dual poly-cotton

Dimensions

  • Nominal diameter 12
  • 329mm
  • Overall diameter 329mm
  • Baffle cutout diameter 284mm
  • Mounting depth 189mm
  • Volume occupied by the driver (estimated) 3L
  • Frame material Die-cast Aluminium

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