Beyma 12CMV2

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.5dB
• Frequency response 50 - 6000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 49Hz
• Mechanical quality factor QMS 3.90
• Electrical quality factor QES 0.54
• Total quality factor QTS 0.47

Large signal parameters

• Maximum linear excursion xmax 7mm
• Maximum excursion before damage xlim 29mm
• Air volume displaced at xmax VD 371cm³
• Power handling P 320W
• Program power Pmax 640W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.0Ω
• Inductance (1kHz) LE 1mH
• VC Diameter 63.5mm
• Winding height HVC 17mm

Magnet

• Force factor Bl 13.7N/A
• Motor constant Bl/√RE 5.59N/√W
• Air gap height HAG 7mm

Diaphragm

• Effective diameter 260mm
• Effective area SD 530cm²
• Moving mass MMS 54g
• Moving mass (without air load) MMD 45.4g

Suspensions

• Stiffness KMS 5.18N/mm
• Compliance CMS 193µm/N
• Equivalent volume to the compliance VAS 76L
• Mechanical resistance RMS 4.2N·s/m

Dimensions

• Nominal diameter 12″
• 300mm
• Overall diameter 310mm
• Baffle cutout diameter 280mm
• Overall depth 130mm
• Volume occupied by the driver (estimated) 2.1L
• Net weight 4.6kg