RCF MB12Y901

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.4dB
• Frequency response 45 - 2500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 55Hz
• Mechanical quality factor QMS 5.90
• Electrical quality factor QES 0.27
• Total quality factor QTS 0.26

Large signal parameters

• Maximum linear excursion xmax 6mm
• Maximum excursion before damage xlim 20mm
• Air volume displaced at xmax VD 300cm³
• Power handling P 700W
• Program power Pmax 1400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.4Ω
• Inductance (1kHz) LE 1.3mH
• VC Diameter 89mm
• Winding height HVC 19mm
• Winding material Copper
• Former material Glass Fiber

Magnet

• Force factor Bl 22.5N/A
• Motor constant Bl/√RE 9.68N/√W
• Air gap height HAG 10mm

Diaphragm

• Effective diameter 260mm
• Effective area SD 500cm²
• Moving mass MMS 72g
• Moving mass (without air load) MMD 63.7g

Suspensions

• Stiffness KMS 8.77N/mm
• Compliance CMS 114µm/N
• Equivalent volume to the compliance VAS 46L
• Mechanical resistance RMS 4.22N·s/m
• Spider material with silicon damping

Dimensions

• Nominal diameter 12″
• 305mm
• Overall diameter 320mm
• Baffle cutout diameter 284mm
• Volume occupied by the driver 2.2L
• Net weight 7.6kg