Focal UTOPIA M 8 WM

4Ω

Woofer

Nominal diameter8″ / 203 mm
Resonance49 Hz
Q factor0.90
Sensitivity87.9 dB
Linear excursion± 5.5 mm
Program Power200 W
Focal 8 WM WooferFocal 8 WM WooferFocal 8 WM Woofer
Impedance
Excursion
Velocity
SPL
Phase
Group delay
Step response
Tone Burst
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 87.9dB
  • Frequency response 45 - 50000Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 49Hz
  • Mechanical quality factor QMS 9.00
  • Electrical quality factor QES 1.00
  • Total quality factor QTS 0.90

Large signal parameters

  • Maximum linear excursion (one way) xmax 5.5mm
  • Air volume displaced at xmax VD 119cm³
  • Power handling P 100W
  • Program power Pmax 200W

Voice Coil

  • Nominal impedance Z 4Ω
  • DC resistance RE 2.7Ω
  • Inductance (1kHz, estimated) LE 0.48mH
  • VC Diameter 80mm
  • Winding material Copper Clad Aluminium
  • Former material Glass Fiber

Magnet

  • Force factor Bl 4.4N/A
  • Motor constant Bl/√RE 2.68N/√W
  • Diameter 75mm
  • Height 4mm

Diaphragm

  • Effective diameter 166mm
  • Effective area SD 216cm²
  • Moving mass MMS 23g
  • Moving mass (without air load) MMD 20.7g
  • Material M-shape W

Suspensions

  • Stiffness KMS 2.22N/mm
  • Compliance CMS 450µm/N
  • Equivalent volume to the compliance VAS 30L
  • Mechanical resistance RMS 0.79N·s/m
  • Surround material Butyl

Dimensions

  • Nominal diameter 8″
  • 203mm
  • Baffle cutout diameter 185mm
  • Mounting depth 52mm
  • Volume occupied by the driver (estimated) 0.48L
  • Net weight 1.2kg
SPL & Impedance
Focal 8 WM SPL & Impedance
Focal 8 WM Dimensions
PDF fileDatasheet

Export this driver to a simulation software:

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