Eminence DELTA PRO 12-450-4

Woofer

Nominal diameter12″ / 305 mm
Resonance45 Hz
Q factor0.39
Sensitivity96.4 dB
Linear excursion± 5.2 mm
Program Power900 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 96.4dB
  • Frequency response 45 - 3800Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 45Hz
  • Mechanical quality factor QMS 7.97
  • Electrical quality factor QES 0.41
  • Total quality factor QTS 0.39

Large signal parameters

  • Maximum linear excursion xmax 5.2mm
  • Maximum excursion before damage xlim 13.7mm
  • Air volume displaced at xmax VD 277cm³
  • Power handling P 450W
  • Program power Pmax 900W

Voice Coil

  • Nominal impedance Z 4Ω
  • DC resistance RE 3.7Ω
  • Inductance (1kHz) LE 0.45mH
  • VC Diameter 64mm
  • Winding material Aluminum
  • Former material Polyimide

Magnet

  • Force factor Bl 9.51N/A
  • Motor constant Bl/√RE 4.98N/√W
  • Air gap height HAG 7.9mm
  • Weight 1.588kg
  • Material Ferrite

Diaphragm

  • Effective diameter 260mm
  • Effective area SD 532cm²
  • Moving mass MMS 36g
  • Moving mass (without air load) MMD 27.2g
  • Material Paper

Suspensions

  • Stiffness KMS 2.86N/mm
  • Compliance CMS 350µm/N
  • Equivalent volume to the compliance VAS 138L
  • Mechanical resistance RMS 1.28N·s/m
  • Surround material Cloth

Dimensions

  • Nominal diameter 12
  • 305mm
  • Overall diameter 315mm
  • Baffle cutout diameter 281mm
  • Overall depth 140mm
  • Volume occupied by the driver 2.25L
  • Net weight 5.31kg
  • Frame material Die-cast aluminum
Eminence DELTA PRO 12-450-4 SPL & Impedance


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