B&C Speaker 8CL51

• Sensitivity (1W, 1m, infinite baffle) SPL1W 91.9dB
• Frequency response 85 - 4000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 83Hz
• Mechanical quality factor QMS 8.90
• Electrical quality factor QES 0.54
• Total quality factor QTS 0.51

Large signal parameters

• Maximum linear excursion xmax 6mm
• Air volume displaced at xmax VD 132cm³
• Power handling P 200W
• Program power Pmax 400W

Voice Coil

• Nominal impedance Z 16Ω
• DC resistance RE 10.1Ω
• Inductance (1kHz) LE 0.9mH
• VC Diameter 51mm
• Winding height HVC 17mm
• Winding material Copper
• Former material Glass Fibre

Magnet

• Flux density B 1.15T
• Force factor Bl 16.1N/A
• Motor constant Bl/√RE 5.07N/√W
• Air gap height HAG 8mm
• Material Neodymium Inside Slug

Diaphragm

• Effective diameter 167mm
• Effective area SD 220cm²
• Moving mass MMS 26g
• Moving mass (without air load) MMD 23.6g
• Material Waterproof Front Side

Suspensions

• Stiffness KMS 7.25N/mm
• Compliance CMS 138µm/N
• Equivalent volume to the compliance VAS 9.5L
• Mechanical resistance RMS 1.52N·s/m

Dimensions

• Nominal diameter 8″
• 200mm
• Overall diameter 209mm
• Baffle cutout diameter 186mm
• Overall depth 96mm
• Flange thickness 9mm
• Mounting depth 87mm
• Volume occupied by the driver 1.1L
• Net weight 1.25kg