B&C Speaker 15NDL76

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97.2dB
• Frequency response 40 - 2000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 37Hz
• Mechanical quality factor QMS 4.50
• Electrical quality factor QES 0.24
• Total quality factor QTS 0.22

Large signal parameters

• Maximum linear excursion xmax 7mm
• Air volume displaced at xmax VD 599cm³
• Power handling P 500W
• Program power Pmax 1000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.3Ω
• Inductance (1kHz) LE 1.5mH
• VC Diameter 76mm
• Winding height HVC 18mm
• Winding material Copper
• Former material Glass Fibre

Magnet

• Flux density B 1.25T
• Force factor Bl 22.5N/A
• Motor constant Bl/√RE 9.77N/√W
• Air gap height HAG 11mm
• Material Neodymium Inside Slug

Diaphragm

• Effective diameter 330mm
• Effective area SD 855cm²
• Moving mass MMS 96g
• Moving mass (without air load) MMD 78.4g
• Material Waterproof Both Sides

Suspensions

• Stiffness KMS 5.32N/mm
• Compliance CMS 188µm/N
• Equivalent volume to the compliance VAS 195L
• Mechanical resistance RMS 4.96N·s/m

Dimensions

• Nominal diameter 15″
• 380mm
• Overall diameter 393mm
• Baffle cutout diameter 354mm
• Overall depth 171mm
• Flange thickness 16mm
• Mounting depth 155mm
• Volume occupied by the driver 3.5L
• Net weight 4.7kg