B&C Speaker 8CL51

• Sensitivity (1W, 1m, infinite baffle) SPL1W 91.3dB
• Frequency response 70 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 69Hz
• Mechanical quality factor QMS 5.60
• Electrical quality factor QES 0.44
• Total quality factor QTS 0.41

Large signal parameters

• Maximum linear excursion xmax 6.5mm
• Air volume displaced at xmax VD 143cm³
• Power handling P 200W
• Program power Pmax 400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.1Ω
• Inductance (1kHz) LE 0.5mH
• VC Diameter 51mm
• Winding height HVC 17mm
• Winding material Copper
• Former material Glass Fibre

Magnet

• Flux density B 1.15T
• Force factor Bl 12N/A
• Motor constant Bl/√RE 5.31N/√W
• Air gap height HAG 8mm
• Material Neodymium Inside Slug

Diaphragm

• Effective diameter 167mm
• Effective area SD 220cm²
• Moving mass MMS 29g
• Moving mass (without air load) MMD 26.6g
• Material Waterproof Front Side

Suspensions

• Stiffness KMS 5.38N/mm
• Compliance CMS 186µm/N
• Equivalent volume to the compliance VAS 12.5L
• Mechanical resistance RMS 2.25N·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