B&C Speaker 8NDL64

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.6dB
• Frequency response 80 - 4000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 80Hz
• Mechanical quality factor QMS 10.91
• Electrical quality factor QES 0.25
• Total quality factor QTS 0.25

Large signal parameters

• Maximum linear excursion xmax 4.5mm
• Air volume displaced at xmax VD 99cm³
• Power handling P 350W
• Program power Pmax 700W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.4Ω
• Inductance (1kHz) LE 0.62mH
• VC Diameter 64mm
• Winding height HVC 14mm
• Winding material Copper
• Former material Glass Fibre

Magnet

• Flux density B 1.25T
• Force factor Bl 17.5N/A
• Motor constant Bl/√RE 7.53N/√W
• Air gap height HAG 8mm
• Material Neodymium Inside Slug

Diaphragm

• Effective diameter 167mm
• Effective area SD 220cm²
• Moving mass MMS 28g
• Moving mass (without air load) MMD 25.5g
• Material Waterproof Front Side

Suspensions

• Stiffness KMS 7.14N/mm
• Compliance CMS 140µm/N
• Equivalent volume to the compliance VAS 9.6L
• Mechanical resistance RMS 1.29N·s/m

Dimensions

• Nominal diameter 8″
• 200mm
• Overall diameter 225mm
• Baffle cutout diameter 187mm
• Overall depth 95mm
• Flange thickness 10mm
• Mounting depth 85mm
• Volume occupied by the driver 1.5L
• Net weight 2.6kg