B&C Speaker 6CLA51

• Sensitivity (1W, 1m, infinite baffle) SPL1W 92.2dB
• Frequency response 100 - 4000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 107Hz
• Mechanical quality factor QMS 3.20
• Electrical quality factor QES 0.39
• Total quality factor QTS 0.34

Large signal parameters

• Maximum linear excursion xmax 4.8mm
• Air volume displaced at xmax VD 63cm³
• Power handling P 250W
• Program power Pmax 500W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 4.8Ω
• Inductance (1kHz) LE 0.85mH
• VC Diameter 51mm
• Winding height HVC 13.5mm
• Winding material Aluminium
• Former material Polyimide

Magnet

• Flux density B 1.05T
• Force factor Bl 11.2N/A
• Motor constant Bl/√RE 5.11N/√W
• Air gap height HAG 8mm
• Material Neodymium Inside Slug

Diaphragm

• Effective diameter 130mm
• Effective area SD 132cm²
• Moving mass MMS 15g
• Moving mass (without air load) MMD 13.8g
• Material Waterproof Front Side

Suspensions

• Stiffness KMS 6.76N/mm
• Compliance CMS 148µm/N
• Equivalent volume to the compliance VAS 3.6L
• Mechanical resistance RMS 3.15N·s/m

Dimensions

• Nominal diameter 6.5″
• 170mm
• Overall diameter 180mm
• Baffle cutout diameter 146mm
• Overall depth 80mm
• Flange thickness 7mm
• Mounting depth 73mm
• Volume occupied by the driver (estimated) 0.46L
• Net weight 1.2kg