B&C Speaker 8MBX51

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.5dB
• Frequency response 65 - 4000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 68Hz
• Mechanical quality factor QMS 3.30
• Electrical quality factor QES 0.43
• Total quality factor QTS 0.38

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 10.2Ω
• Inductance (1kHz) LE 0.65mH
• VC Diameter 51mm
• Winding height HVC 15mm
• Winding material Aluminium
• Former material Glass Fibre

Magnet

• Flux density B 1.3T
• Force factor Bl 13.7N/A
• Motor constant Bl/√RE 4.29N/√W
• Air gap height HAG 7mm
• Material Neodymium Ring

Diaphragm

• Effective diameter 167mm
• Effective area SD 220cm²
• Moving mass MMS 18.4g
• Moving mass (without air load) MMD 15.9g
• Material Waterproof

Suspensions

• Stiffness KMS 3.38N/mm
• Compliance CMS 296µm/N
• Equivalent volume to the compliance VAS 22L
• Mechanical resistance RMS 2.38N·s/m

Dimensions

• Nominal diameter 8″
• 200mm
• Overall diameter 225mm
• Baffle cutout diameter 187mm
• Overall depth 93mm
• Flange thickness 9mm
• Mounting depth 84mm
• Volume occupied by the driver 1.1L
• Net weight 1.8kg