DB Drive X-W12D4

2x4Ω

Subwoofer

Nominal diameter12″ / 305 mm
Resonance30.3 Hz
Q factor0.53
Sensitivity86.3 dB
Linear excursion± 8.5 mm
Program Power600 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 86.3dB

Thiele & Small parameters

  • Resonance frequency (free air) fS 30.3Hz
  • Mechanical quality factor QMS 5.80
  • Electrical quality factor QES 0.58
  • Total quality factor QTS 0.53

Large signal parameters

  • Maximum linear excursion (one way) xmax 8.5mm
  • Air volume displaced at xmax VD 423cm³
  • Power handling P 300W
  • Program power Pmax 600W

Voice Coil

  • Nominal impedance Z 2 x 4Ω
  • DC resistance (in series) RE 6.4Ω
  • Inductance (1kHz, in series, estimated) LE 4.55mH
  • VC Diameter 38.8mm

Magnet

  • Force factor (in series) Bl 19.9N/A
  • Motor constant Bl/√RE 7.88N/√W
  • Material Ferrite Oxide

Diaphragm

  • Effective diameter 252mm
  • Effective area SD 498cm²
  • Moving mass MMS 183g
  • Moving mass (without air load) MMD 175g
  • Material Weather Rated IMPP

Suspensions

  • Stiffness KMS 6.62N/mm
  • Compliance CMS 151µm/N
  • Equivalent volume to the compliance VAS 53.1L
  • Mechanical resistance RMS 6.01N·s/m
  • Surround material Rubber
  • Spider material Poly Cotton

Dimensions

  • Nominal diameter 12
  • 305mm
  • Volume occupied by the driver (estimated) 2.4L
  • Frame material Stamped steel

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