RCF MB12X301

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.8dB
• Frequency response 45 - 2500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 50Hz
• Mechanical quality factor QMS 9.00
• Electrical quality factor QES 0.30
• Total quality factor QTS 0.29

Large signal parameters

• Maximum linear excursion xmax 6mm
• Maximum excursion before damage xlim 19.5mm
• Air volume displaced at xmax VD 300cm³
• Power handling P 500W
• Program power Pmax 1000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.4Ω
• Inductance (1kHz) LE 0.6mH
• VC Diameter 76mm
• Winding height HVC 17mm
• Winding material Copper

Magnet

• Force factor Bl 18N/A
• Motor constant Bl/√RE 7.75N/√W
• Material Ceramic

Diaphragm

• Effective diameter 260mm
• Effective area SD 500cm²
• Moving mass MMS 57g
• Moving mass (without air load) MMD 48.7g

Suspensions

• Stiffness KMS 5.08N/mm
• Compliance CMS 197µm/N
• Equivalent volume to the compliance VAS 70L
• Mechanical resistance RMS 1.99N·s/m
• Surround material Polycotton

Dimensions

• Nominal diameter 12″
• 305mm
• Overall diameter 320mm
• Baffle cutout diameter 284mm
• Overall depth 143mm
• Flange thickness 10mm
• Mounting depth 133mm
• Volume occupied by the driver 2.2L
• Net weight 7.57kg