Beyma 12MC700Nd

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96dB
• Frequency response 60 - 4000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 51Hz
• Mechanical quality factor QMS 4.10
• Electrical quality factor QES 0.26
• Total quality factor QTS 0.24

Large signal parameters

• Maximum linear excursion xmax 7mm
• Maximum excursion before damage xlim 48mm
• Air volume displaced at xmax VD 385cm³
• Power handling P 700W
• Program power Pmax 1400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.2Ω
• Inductance (1kHz) LE 1mH
• VC Diameter 76.2mm
• Winding height HVC 18mm

Magnet

• Force factor Bl 21.6N/A
• Motor constant Bl/√RE 9.47N/√W
• Air gap height HAG 10mm

Diaphragm

• Effective diameter 265mm
• Effective area SD 550cm²
• Moving mass MMS 72g
• Moving mass (without air load) MMD 63g

Suspensions

• Stiffness KMS 7.35N/mm
• Compliance CMS 136µm/N
• Equivalent volume to the compliance VAS 58L
• Mechanical resistance RMS 5.6N·s/m

Dimensions

• Nominal diameter 12″
• 300mm
• Overall diameter 312mm
• Baffle cutout diameter 278mm
• Overall depth 143mm
• Volume occupied by the driver (estimated) 1.9L
• Net weight 3.7kg