Beyma 12MI100

• Sensitivity (1W, 1m, infinite baffle) SPL1W 98.5dB
• Frequency response 60 - 4000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 58Hz
• Mechanical quality factor QMS 5.50
• Electrical quality factor QES 0.23
• Total quality factor QTS 0.22

Large signal parameters

• Maximum linear excursion xmax 3mm
• Maximum excursion before damage xlim 24mm
• Air volume displaced at xmax VD 159cm³
• Power handling P 450W
• Program power Pmax 900W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.3Ω
• Inductance (1kHz) LE 1mH
• VC Diameter 76.2mm
• Winding height HVC 13.5mm

Magnet

• Force factor Bl 21.6N/A
• Motor constant Bl/√RE 8.61N/√W
• Air gap height HAG 10mm

Diaphragm

• Effective diameter 260mm
• Effective area SD 530cm²
• Moving mass MMS 47g
• Moving mass (without air load) MMD 38.3g

Suspensions

• Stiffness KMS 6.14N/mm
• Compliance CMS 163µm/N
• Equivalent volume to the compliance VAS 64L
• Mechanical resistance RMS 3.3N·s/m

Dimensions

• Nominal diameter 12″
• 300mm
• Overall diameter 312mm
• Baffle cutout diameter 278mm
• Overall depth 135mm
• Volume occupied by the driver (estimated) 2.9L
• Net weight 7.2kg