MATCH UP W8BMW-S

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.6dB

Thiele & Small parameters

• Resonance frequency (free air) fS 49Hz
• Mechanical quality factor QMS 3.80
• Electrical quality factor QES 0.61
• Total quality factor QTS 0.53

Large signal parameters

• Maximum linear excursion xmax 4mm
• Air volume displaced at xmax VD 86cm³
• Power handling P 200W
• Program power Pmax 400W

Voice Coil

• Nominal impedance Z 2Ω
• DC resistance RE 2.0Ω
• Inductance (1kHz, estimated) LE 0.58mH
• VC Diameter 42.5mm
• Winding height HVC 12.5mm

Magnet

• Force factor Bl 7.1N/A
• Motor constant Bl/√RE 5.02N/√W

Diaphragm

• Effective diameter 165mm
• Effective area SD 214cm²
• Moving mass MMS 47.4g
• Moving mass (without air load) MMD 45g
• Material Extremely stiff fiberglass cone

Suspensions

• Stiffness KMS 4.76N/mm
• Compliance CMS 210µm/N
• Equivalent volume to the compliance VAS 13.9L
• Mechanical resistance RMS 3.97N·s/m

Dimensions

• Nominal diameter 8″
• 216mm
• Overall diameter 216mm
• Baffle cutout diameter 175mm
• Mounting depth 40mm
• Volume occupied by the driver (estimated) 1L