Beyma CM-6

• Sensitivity (1W, 1m, infinite baffle) SPL1W 90.6dB
• Frequency response 150 - 6000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 138Hz
• Mechanical quality factor QMS 4.74
• Electrical quality factor QES 1.16
• Total quality factor QTS 0.93

Large signal parameters

• Maximum linear excursion xmax 2.5mm
• Maximum excursion before damage xlim 10.4mm
• Air volume displaced at xmax VD 35cm³
• Power handling P 80W
• Program power Pmax 160W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.0Ω
• Inductance (1kHz) LE 0.6mH
• VC Diameter 38.5mm
• Winding height HVC 7.5mm

Magnet

• Force factor Bl 8.1N/A
• Motor constant Bl/√RE 3.31N/√W
• Air gap height HAG 6mm
• Material Ferrite

Diaphragm

• Effective diameter 134mm
• Effective area SD 140cm²
• Moving mass MMS 14g
• Moving mass (without air load) MMD 12.8g

Suspensions

• Stiffness KMS 11.1N/mm
• Compliance CMS 90.2µm/N
• Equivalent volume to the compliance VAS 2.47L
• Mechanical resistance RMS 2.69N·s/m

Dimensions

• Nominal diameter 6.5″
• 165mm
• Volume occupied by the driver (estimated) 0.89L
• Net weight 2.16kg