B&C Speaker 6FHX51

• Sensitivity (1W, 1m, infinite baffle) SPL1W 91.3dB
• Frequency response 85 - 18000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 85Hz
• Mechanical quality factor QMS 7.80
• Electrical quality factor QES 0.40
• Total quality factor QTS 0.37

Large signal parameters

• Maximum linear excursion xmax 5.7mm
• Air volume displaced at xmax VD 75cm³
• Power handling P 150W
• Program power Pmax 300W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.5Ω
• Inductance (1kHz) LE 1mH
• VC Diameter 51mm
• Winding height HVC 13mm
• Winding material Copper
• Former material Kapton

Magnet

• Flux density B 1.05T
• Force factor Bl 11.3N/A
• Motor constant Bl/√RE 4.82N/√W
• Air gap height HAG 6mm
• Material Ferrite

Diaphragm

• Effective diameter 130mm
• Effective area SD 132cm²
• Moving mass MMS 16g
• Moving mass (without air load) MMD 14.8g
• Material Waterproof Front Side

Suspensions

• Stiffness KMS 4.95N/mm
• Compliance CMS 202µm/N
• Equivalent volume to the compliance VAS 5L
• Mechanical resistance RMS 1.1N·s/m

Dimensions

• Nominal diameter 6.5″
• 170mm
• Overall diameter 187mm
• Baffle cutout diameter 146mm
• Overall depth 122mm
• Flange thickness 12mm
• Mounting depth 110mm
• Volume occupied by the driver (estimated) 1L
• Net weight 2.6kg