BMS 12C262

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.4dB
• Frequency response 55 - 2000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 47.3Hz
• Mechanical quality factor QMS 5.40
• Electrical quality factor QES 0.25
• Total quality factor QTS 0.24

Large signal parameters

• Maximum linear excursion xmax 2.5mm
• Air volume displaced at xmax VD 122cm³
• Power handling P 400W
• Program power Pmax 800W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.7Ω
• Inductance (1kHz, estimated) LE 1.99mH
• VC Diameter 77mm
• Winding height HVC 15mm
• Winding material Copper
• Former material Kapton

Magnet

• Flux density B 1.9T
• Force factor Bl 20.6N/A
• Motor constant Bl/√RE 8.63N/√W
• Air gap height HAG 10mm
• Material Ceramic

Diaphragm

• Effective diameter 249mm
• Effective area SD 487cm²
• Moving mass MMS 63g
• Moving mass (without air load) MMD 55g
• Material Polyester

Suspensions

• Stiffness KMS 5.56N/mm
• Compliance CMS 180µm/N
• Equivalent volume to the compliance VAS 60.6L
• Mechanical resistance RMS 3.47N·s/m

Dimensions

• Nominal diameter 12″
• 318mm
• Overall diameter 318mm
• Baffle cutout diameter 284mm
• Overall depth 179mm
• Volume occupied by the driver (estimated) 3.7L
• Net weight 7.8kg
• Frame material Cast Aluminum