Beyma CM-8/B

• Sensitivity (1W, 1m, infinite baffle) SPL1W 91.3dB
• Frequency response 40 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 73Hz
• Mechanical quality factor QMS 13.46
• Electrical quality factor QES 0.65
• Total quality factor QTS 0.62

Large signal parameters

• Maximum linear excursion xmax 6.7mm
• Maximum excursion before damage xlim 12.5mm
• Air volume displaced at xmax VD 147cm³
• Power handling P 100W
• Program power Pmax 200W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.2Ω
• Inductance (1kHz) LE 1.2mH
• VC Diameter 38.1mm
• Winding height HVC 16mm

Magnet

• Force factor Bl 9.8N/A
• Motor constant Bl/√RE 3.94N/√W
• Air gap height HAG 6mm
• Material Ferrite

Diaphragm

• Effective diameter 167mm
• Effective area SD 220cm²
• Moving mass MMS 22g
• Moving mass (without air load) MMD 19.7g

Suspensions

• Stiffness KMS 4.63N/mm
• Compliance CMS 216µm/N
• Equivalent volume to the compliance VAS 14.6L
• Mechanical resistance RMS 0.75N·s/m

Dimensions

• Nominal diameter 8″
• 200mm
• Volume occupied by the driver (estimated) 0.9L
• Net weight 2.18kg