ALPINE R2-W10D2

2x2Ω
2x4Ω

Subwoofer

Nominal diameter10″ / 250 mm
Resonance31 Hz
Q factor0.47
Sensitivity82.6 dB
Linear excursion± 20 mm
Program power1500 W
ALPINE R2-W10D2 SubwooferALPINE R2-W10D2 SubwooferALPINE R2-W10D2 Subwoofer
Excursion
Velocity
SPL
Phase
Group delay
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 82.6dB
  • Frequency response 26 - 200Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 31Hz
  • Mechanical quality factor QMS 7.07
  • Electrical quality factor QES 0.50
  • Total quality factor QTS 0.47

Large signal parameters

  • Maximum linear excursion (one way) xmax 20mm
  • Maximum excursion before damage xlim 70mm
  • Air volume displaced at xmax VD 666cm³
  • Power handling P 750W
  • Program power Pmax 1500W
  • Peak power Ppeak 2250W

Voice Coil

  • Nominal impedance Z 2 x 2Ω
  • DC resistance (in series) RE 3.8Ω
  • Inductance (1kHz, in series, estimated) LE 3.12mH
  • VC Diameter 65.5mm

Magnet

  • Force factor (in series) Bl 18.3N/A
  • Motor constant Bl/√RE 9.39N/√W
  • Weight 3.49kg

Diaphragm

  • Effective diameter 206mm
  • Effective area SD 333cm²
  • Moving mass (including air load) MMS 227g
  • Moving mass MMD 224g
  • Material hybrid poly ceramic composite

Suspensions

  • Stiffness KMS 8.62N/mm
  • Compliance CMS 116µm/N
  • Equivalent volume to the compliance VAS 18.2L
  • Mechanical resistance RMS 6.26N·s/m
  • Surround material HAMR

Dimensions

  • Nominal diameter 10″
  • 250mm
  • Overall diameter 272mm
  • Baffle cutout diameter 231mm
  • Overall depth 175mm
  • Flange thickness 23mm
  • Mounting depth 150mm
  • Volume occupied by the driver (estimated) 2.6L
Impedance
Step response
Tone burst
ALPINE R2-W10D2 Dimensions
PDF fileDatasheet

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