BMS 12C382

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.6dB
• Frequency response 45 - 20000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 52Hz
• Mechanical quality factor QMS 5.60
• Electrical quality factor QES 0.30
• Total quality factor QTS 0.29

Large signal parameters

• Maximum linear excursion xmax 4.5mm
• Air volume displaced at xmax VD 219cm³
• Power handling P 500W
• Program power Pmax 1000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.8Ω
• Inductance (1kHz) LE 0.9mH
• VC Diameter 77mm
• Winding height HVC 19mm
• Winding material Copper
• Former material Kapton

Magnet

• Flux density B 1.8T
• Force factor Bl 18.6N/A
• Motor constant Bl/√RE 7.72N/√W
• Air gap height HAG 10mm
• Material Ceramic

Diaphragm

• Effective diameter 249mm
• Effective area SD 487cm²
• Moving mass MMS 55g
• Moving mass (without air load) MMD 47g
• Material Polyester

Suspensions

• Stiffness KMS 5.88N/mm
• Compliance CMS 170µm/N
• Equivalent volume to the compliance VAS 57L
• Mechanical resistance RMS 3.21N·s/m

Dimensions

• Nominal diameter 12″
• 318mm
• Overall diameter 318mm
• Baffle cutout diameter 285mm
• Overall depth 166mm
• Volume occupied by the driver (estimated) 3.5L
• Net weight 7.75kg
• Frame material Cast Aluminum