Audio System CO 08 DC EVO

2x4Ω
4Ω4x2Ω

Subwoofer

Nominal diameter8″ / 212 mm
Resonance42.3 Hz
Q factor0.44
Sensitivity86.8 dB
Linear excursion± 7.5 mm
Program Power280 W
Audio System CO 08 DC EVO SubwooferAudio System CO 08 DC EVO SubwooferAudio System CO 08 DC EVO Subwoofer
Excursion
Velocity
SPL
Phase
Group delay
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 86.8dB
  • Frequency response 40 - 200Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 42.3Hz
  • Mechanical quality factor QMS 5.90
  • Electrical quality factor QES 0.48
  • Total quality factor QTS 0.44

Large signal parameters

  • Maximum linear excursion (one way) xmax 7.5mm
  • Air volume displaced at xmax VD 155cm³
  • Power handling P 180W
  • Program power Pmax 280W

Voice Coil

  • Nominal impedance Z 2 x 4Ω
  • DC resistance (in series) RE 6.4Ω
  • Inductance (1kHz, in series, estimated) LE 1.81mH
  • VC Diameter 38.6mm
  • Former material Aluminium

Magnet

  • Force factor (in series) Bl 13.2N/A
  • Motor constant Bl/√RE 5.22N/√W
  • Diameter 120mm

Diaphragm

  • Effective diameter 162mm
  • Effective area SD 206cm²
  • Moving mass MMS 46g
  • Moving mass (without air load) MMD 43.8g
  • Material Paper-Sandwich

Suspensions

  • Stiffness KMS 3.47N/mm
  • Compliance CMS 288µm/N
  • Equivalent volume to the compliance VAS 17L
  • Mechanical resistance RMS 2.07N·s/m
  • Surround material Rubber / Elastomere
  • Spider material PPTA Connex

Dimensions

  • Nominal diameter 8″
  • 212mm
  • Overall diameter 212mm
  • Baffle cutout diameter 177mm
  • Overall depth 106mm
  • Flange thickness 14mm
  • Mounting depth 92mm
  • Volume occupied by the driver (estimated) 1L
  • Net weight 2.6kg
  • Frame material Steel
Impedance
Step response
Tone Burst
PDF fileDatasheet

Export this driver to a simulation software:

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