RIOT12 D4

2x2Ω
2x4Ω

Subwoofer

Nominal diameter12″ / 325 mm
Resonance30.4 Hz
Q factor0.63
Sensitivity84.1 dB
Linear excursion± 18 mm
Program Power3000 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 84.1dB
  • Frequency response 10 - 500Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 30.4Hz
  • Mechanical quality factor QMS 6.56
  • Electrical quality factor QES 0.70
  • Total quality factor QTS 0.63

Large signal parameters

  • Maximum linear excursion (one way) xmax 18mm
  • Air volume displaced at xmax VD 950cm³
  • Power handling P 1000W
  • Program power Pmax 3000W

Voice Coil

  • Nominal impedance Z 2 x 4Ω
  • DC resistance (in series) RE 6.4Ω
  • Inductance (1kHz, in series) LE 3.62mH
  • VC Diameter 76.2mm
  • Winding material Copper

Magnet

  • Force factor (in series) Bl 22.4N/A
  • Motor constant Bl/√RE 8.85N/√W
  • Weight 6.8kg
  • Material Ferrite

Diaphragm

  • Effective diameter 259mm
  • Effective area SD 528cm²
  • Moving mass MMS 287g
  • Moving mass (without air load) MMD 278g
  • Material RNPP

Suspensions

  • Stiffness KMS 11.1N/mm
  • Compliance CMS 90µm/N
  • Equivalent volume to the compliance VAS 5.6L
  • Mechanical resistance RMS 8.37N·s/m
  • Surround material Tall U Shaped Foam

Dimensions

  • Nominal diameter 12
  • 325mm
  • Overall diameter 325mm
  • Baffle cutout diameter 285mm
  • Overall depth 203mm
  • Flange thickness 17mm
  • Mounting depth 186mm
  • Volume occupied by the driver 5.24L
  • Net weight 12.0kg

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