Audio System R 10 FLAT EVO 3-D4

2x4Ω

Shallow Subwoofer

Nominal diameter10″ / 250 mm
Resonance36.8 Hz
Q factor0.44
Sensitivity86.4 dB
Linear excursion± 8.8 mm
Program Power400 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 86.4dB
  • Frequency response 35 - 120Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 36.8Hz
  • Mechanical quality factor QMS 6.75
  • Electrical quality factor QES 0.47
  • Total quality factor QTS 0.44

Large signal parameters

  • Maximum linear excursion (one way) xmax 8.8mm
  • Air volume displaced at xmax VD 289cm³
  • Power handling P 300W
  • Program power Pmax 400W

Voice Coil

  • Nominal impedance Z 2 x 4Ω
  • DC resistance (in series) RE 7.2Ω
  • Inductance (1kHz, in series, estimated) LE 2.7mH
  • VC Diameter 50mm
  • Former material Aluminum

Magnet

  • Force factor (in series) Bl 12.8N/A
  • Motor constant Bl/√RE 4.77N/√W
  • Diameter 145mm

Diaphragm

  • Effective diameter 205mm
  • Effective area SD 330cm²
  • Moving mass MMS 70g
  • Moving mass (without air load) MMD 65.5g
  • Material KPC Paper

Suspensions

  • Stiffness KMS 2.48N/mm
  • Compliance CMS 404µm/N
  • Equivalent volume to the compliance VAS 27L
  • Mechanical resistance RMS 2.4N·s/m
  • Surround material Elasthan
  • Spider material PPTA Connex

Dimensions

  • Nominal diameter 10
  • 250mm
  • Overall diameter 262mm
  • Baffle cutout diameter 232mm
  • Overall depth 97mm
  • Flange thickness 17mm
  • Mounting depth 80mm
  • Volume occupied by the driver (estimated) 1.5L
  • Net weight 4.2kg
  • Frame material Steel

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