Earthquake PRO-X128

Subwoofer

Nominal diameter12″ / 312 mm
Resonance49 Hz
Q factor0.35
Sensitivity94.5 dB
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 94.5dB

Thiele & Small parameters

  • Resonance frequency (free air) fS 49Hz
  • Mechanical quality factor QMS 7.62
  • Electrical quality factor QES 0.36
  • Total quality factor QTS 0.35

Large signal parameters

  • Maximum excursion before damage xlim 12.7mm
  • Power handling P 600W
  • Program power Pmax 1200W

Voice Coil

  • Nominal impedance Z 8Ω
  • DC resistance RE 6.0Ω
  • Inductance (1kHz, estimated) LE 2.34mH
  • VC Diameter 100mm

Magnet

  • Force factor Bl 19.5N/A
  • Motor constant Bl/√RE 7.94N/√W
  • Diameter 220mm

Diaphragm

  • Effective diameter 270mm
  • Effective area SD 572cm²
  • Moving mass (including air load) MMS 74.3g
  • Moving mass MMD 64.9g

Suspensions

  • Stiffness KMS 7.04N/mm
  • Compliance CMS 142µm/N
  • Equivalent volume to the compliance VAS 66L
  • Mechanical resistance RMS 3N·s/m

Dimensions

  • Nominal diameter 12
  • 312mm
  • Overall diameter 312mm
  • Baffle cutout diameter 284mm
  • Overall depth 122mm
  • Flange thickness 0mm
  • Mounting depth 122mm
  • Volume occupied by the driver 4.59L
Earthquake PRO-X128 Impedance
Earthquake PRO-X128 Dimensions

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