Focal UTOPIA M 8 WM

• 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 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