BMS 12CN682

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.9dB
• Frequency response 50 - 20000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 46Hz
• Mechanical quality factor QMS 5.80
• Electrical quality factor QES 0.27
• Total quality factor QTS 0.26

Large signal parameters

• Maximum linear excursion xmax 5.5mm
• Air volume displaced at xmax VD 268cm³
• Power handling P 500W
• Program power Pmax 1000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.7Ω
• Inductance (1kHz) LE 0.6mH
• VC Diameter 77mm
• Winding height HVC 19mm
• Winding material Copper
• Former material Kapton

Magnet

• Flux density B 2.2T
• Force factor Bl 20.6N/A
• Motor constant Bl/√RE 8.63N/√W
• Air gap height HAG 8mm
• Material Neodymium

Diaphragm

• Effective diameter 249mm
• Effective area SD 487cm²
• Moving mass MMS 69g
• Moving mass (without air load) MMD 61g
• Material Polyester

Suspensions

• Stiffness KMS 5.88N/mm
• Compliance CMS 170µm/N
• Equivalent volume to the compliance VAS 58L
• Mechanical resistance RMS 3.44N·s/m

Dimensions

• Nominal diameter 12″
• 318mm
• Overall diameter 318mm
• Baffle cutout diameter 281mm
• Overall depth 215mm
• Volume occupied by the driver (estimated) 3.1L
• Net weight 5.1kg
• Frame material Cast Aluminum