Beyma 12MC500

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96.2dB
• Frequency response 65 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 57Hz
• Mechanical quality factor QMS 7.80
• Electrical quality factor QES 0.35
• Total quality factor QTS 0.34

Large signal parameters

• Maximum linear excursion xmax 8mm
• Maximum excursion before damage xlim 40mm
• Air volume displaced at xmax VD 440cm³
• Power handling P 500W
• Program power Pmax 1000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.6Ω
• Inductance (1kHz) LE 0.7mH
• VC Diameter 63.5mm
• Winding height HVC 19.5mm

Magnet

• Force factor Bl 18.3N/A
• Motor constant Bl/√RE 7.73N/√W
• Air gap height HAG 9.5mm

Diaphragm

• Effective diameter 265mm
• Effective area SD 550cm²
• Moving mass MMS 59g
• Moving mass (without air load) MMD 50g

Suspensions

• Stiffness KMS 7.58N/mm
• Compliance CMS 132µm/N
• Equivalent volume to the compliance VAS 57L
• Mechanical resistance RMS 2.7N·s/m

Dimensions

• Nominal diameter 12″
• 300mm
• Overall diameter 312mm
• Baffle cutout diameter 278mm
• Overall depth 140mm
• Volume occupied by the driver (estimated) 2.6L
• Net weight 5.8kg