Beyma 12MCB700

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.7dB
• Frequency response 55 - 4000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 51Hz
• Mechanical quality factor QMS 3.90
• Electrical quality factor QES 0.29
• Total quality factor QTS 0.27

Large signal parameters

• Maximum linear excursion xmax 7mm
• Maximum excursion before damage xlim 45mm
• Air volume displaced at xmax VD 385cm³
• Power handling P 700W
• Program power Pmax 1400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.4Ω
• Inductance (1kHz) LE 0.9mH
• VC Diameter 76.2mm
• Winding height HVC 18mm

Magnet

• Force factor Bl 20.4N/A
• Motor constant Bl/√RE 8.78N/√W
• Air gap height HAG 9.5mm

Diaphragm

• Effective diameter 265mm
• Effective area SD 550cm²
• Moving mass MMS 69g
• Moving mass (without air load) MMD 60g

Suspensions

• Stiffness KMS 7.19N/mm
• Compliance CMS 139µm/N
• Equivalent volume to the compliance VAS 59.5L
• Mechanical resistance RMS 5.6N·s/m

Dimensions

• Nominal diameter 12″
• 300mm
• Overall diameter 312mm
• Baffle cutout diameter 278mm
• Overall depth 145mm
• Volume occupied by the driver (estimated) 3.2L
• Net weight 7.8kg