ALPINE SWE-1244E

Subwoofer

Nominal diameter12″ / 300 mm
Resonance31 Hz
Q factor0.53
Sensitivity88.3 dB
Linear excursion± 7.5 mm
Program power400 W
Frequency
Hz
Impedance
Ω
Impedance phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical phase
°
Group delay
ms
Transient response
ms
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Specifications

  • Sensitivity (1W, 1m, infinite baffle) SPL1W 88.3dB
  • Frequency response 30 - 500Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 31Hz
  • Mechanical quality factor QMS 3.30
  • Electrical quality factor QES 0.62
  • Total quality factor QTS 0.53

Large signal parameters

  • Maximum linear excursion (one way) xmax 7.5mm
  • Maximum excursion before damage xlim 18mm
  • Air volume displaced at xmax VD 397cm³
  • Power handling P 200W
  • Program power Pmax 400W
  • Peak power Ppeak 650W

Voice Coil

  • Nominal impedance Z 4Ω
  • DC resistance RE 3.3Ω
  • Inductance (1kHz) LE 0.6mH
  • VC Diameter 50mm
  • Winding height HVC 24.5mm
  • Winding material Copper
  • Former material ASV

Magnet

  • Force factor Bl 10.3N/A
  • Motor constant Bl/√RE 5.67N/√W
  • Air gap height HAG 10mm
  • Diameter 134mm
  • Weight 1.36kg
  • Material Strontium Ferrite

Diaphragm

  • Effective diameter 260mm
  • Effective area SD 529cm²
  • Moving mass (including air load) MMS 102g
  • Moving mass MMD 95.2g
  • Material Pulp, Polypropylene

Suspensions

  • Stiffness KMS 3.88N/mm
  • Compliance CMS 258µm/N
  • Equivalent volume to the compliance VAS 103L
  • Mechanical resistance RMS 6.03N·s/m
  • Surround material Butyl Rubber
  • Spider material Carbonized Coated Cotton

Dimensions

  • Nominal diameter 12
  • 300mm
  • Overall diameter 316mm
  • Baffle cutout diameter 281mm
  • Overall depth 132mm
  • Flange thickness 0mm
  • Mounting depth 132mm
  • Volume occupied by the driver 2.8L
  • Frame material Steel

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