Beyma 12CXA400Nd

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96dB
• Frequency response 50 - 20000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 45Hz
• Mechanical quality factor QMS 7.10
• Electrical quality factor QES 0.26
• Total quality factor QTS 0.25

Large signal parameters

• Maximum linear excursion xmax 6mm
• Maximum excursion before damage xlim 28mm
• Air volume displaced at xmax VD 330cm³
• Power handling P 400W
• Program power Pmax 800W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.6Ω
• Inductance (1kHz) LE 1mH
• VC Diameter 101.6mm
• Winding height HVC 16mm

Magnet

• Force factor Bl 21.4N/A
• Motor constant Bl/√RE 8.33N/√W
• Air gap height HAG 9mm

Diaphragm

• Effective diameter 265mm
• Effective area SD 550cm²
• Moving mass MMS 64g
• Moving mass (without air load) MMD 55g

Suspensions

• Stiffness KMS 4.83N/mm
• Compliance CMS 207µm/N
• Equivalent volume to the compliance VAS 88.5L
• Mechanical resistance RMS 2.5N·s/m

Dimensions

• Nominal diameter 12″
• 300mm
• Overall diameter 312mm
• Baffle cutout diameter 283mm
• Overall depth 153mm
• Volume occupied by the driver (estimated) 2.9L
• Net weight 6.5kg