B&C Speaker 6NDL38

• Sensitivity (1W, 1m, infinite baffle) SPL1W 89.5dB
• Frequency response 70 - 6000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 72Hz
• Mechanical quality factor QMS 11.50
• Electrical quality factor QES 0.44
• Total quality factor QTS 0.42

Large signal parameters

• Maximum linear excursion xmax 6mm
• Air volume displaced at xmax VD 79cm³
• Power handling P 150W
• Program power Pmax 300W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.2Ω
• Inductance (1kHz) LE 0.6mH
• VC Diameter 38mm
• Winding height HVC 12mm
• Winding material Copper
• Former material Kapton

Magnet

• Flux density B 1.15T
• Force factor Bl 9.5N/A
• Motor constant Bl/√RE 4.17N/√W
• Air gap height HAG 6mm
• Material Neodymium Ring

Diaphragm

• Effective diameter 130mm
• Effective area SD 132cm²
• Moving mass MMS 17g
• Moving mass (without air load) MMD 15.8g
• Material Waterproof Front Side

Suspensions

• Stiffness KMS 3.46N/mm
• Compliance CMS 289µm/N
• Equivalent volume to the compliance VAS 7L
• Mechanical resistance RMS 0.67N·s/m

Dimensions

• Nominal diameter 6.5″
• 170mm
• Overall diameter 187mm
• Baffle cutout diameter 145mm
• Overall depth 85mm
• Flange thickness 11mm
• Mounting depth 74mm
• Volume occupied by the driver 0.63L
• Net weight 1.2kg