Image Dynamics IDMAX15D2 V4

2x2Ω
2x4Ω

Subwoofer

Nominal diameter15″ / 412 mm
Resonance30 Hz
Q factor0.95
Sensitivity87.2 dB
Linear excursion± 22 mm
Program power1200 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 87.2dB
  • Frequency response 32 - 500Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 30Hz
  • Mechanical quality factor QMS 4.81
  • Electrical quality factor QES 1.20
  • Total quality factor QTS 0.95

Large signal parameters

  • Maximum linear excursion (one way) xmax 22mm
  • Air volume displaced at xmax VD 2057cm³
  • Power handling P 600W
  • Program power Pmax 1200W

Voice Coil

  • Nominal impedance Z 2 x 2Ω
  • DC resistance (in series) RE 3.6Ω
  • Inductance (1kHz, in series) LE 4mH
  • VC Diameter 63.5mm
  • Winding height HVC 60mm
  • Winding material Aluminum
  • Former material BASV

Magnet

  • Force factor (in series) Bl 15.1N/A
  • Motor constant Bl/√RE 7.94N/√W
  • Diameter 199mm
  • Height 105mm
  • Weight 16.3kg
  • Material Ferrite

Diaphragm

  • Effective diameter 345mm
  • Effective area SD 935cm²
  • Moving mass (including air load) MMS 386g
  • Moving mass MMD 366g
  • Material Glass Fiber / Pulp

Suspensions

  • Stiffness KMS 15.9N/mm
  • Compliance CMS 63µm/N
  • Equivalent volume to the compliance VAS 77.5L
  • Mechanical resistance RMS 15.1N·s/m
  • Surround material Santoprene
  • Spider material Nomex

Dimensions

  • Nominal diameter 15
  • 412mm
  • Overall diameter 412mm
  • Baffle cutout diameter 375mm
  • Overall depth 264mm
  • Flange thickness -12mm
  • Mounting depth 276mm
  • Volume occupied by the driver 7.36L
  • Net weight 19.5kg

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