Image Dynamics ID12D2 V4

2x2Ω
2x4Ω

Subwoofer

Nominal diameter12″ / 305 mm
Resonance45 Hz
Q factor0.63
Sensitivity89.2 dB
Linear excursion± 14 mm
Program power500 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 89.2dB
  • Frequency response 45 - 500Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 45Hz
  • Mechanical quality factor QMS 5.56
  • Electrical quality factor QES 0.70
  • Total quality factor QTS 0.63

Large signal parameters

  • Maximum linear excursion (one way) xmax 14mm
  • Air volume displaced at xmax VD 694cm³
  • Power handling P 250W
  • Program power Pmax 500W

Voice Coil

  • Nominal impedance Z 2 x 2Ω
  • DC resistance (in series) RE 3.8Ω
  • Inductance (1kHz, in series) LE 1mH
  • VC Diameter 50.8mm
  • Winding height HVC 35.9mm
  • Winding material Copper
  • Former material BASV

Magnet

  • Force factor (in series) Bl 25.3N/A
  • Motor constant Bl/√RE 9.18N/√W
  • Air gap height HAG 8mm
  • Diameter 142mm
  • Weight 3.6kg

Diaphragm

  • Effective diameter 252mm
  • Effective area SD 498cm²
  • Moving mass (including air load) MMS 208g
  • Moving mass MMD 200g
  • Material Poly/Mica

Suspensions

  • Stiffness KMS 16.2N/mm
  • Compliance CMS 61.6µm/N
  • Equivalent volume to the compliance VAS 21.7L
  • Mechanical resistance RMS 10.6N·s/m
  • Surround material Santoprene
  • Spider material Hybrid Progressive

Dimensions

  • Nominal diameter 12
  • 305mm
  • Overall diameter 311mm
  • Baffle cutout diameter 280mm
  • Overall depth 144mm
  • Flange thickness 0mm
  • Mounting depth 144mm
  • Volume occupied by the driver 3.45L
  • Net weight 4.54kg

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