RCF MB12N251

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.1dB
• Frequency response 45 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 50Hz
• Mechanical quality factor QMS 5.40
• Electrical quality factor QES 0.36
• Total quality factor QTS 0.34

Large signal parameters

• Maximum linear excursion xmax 5mm
• Maximum excursion before damage xlim 19mm
• Air volume displaced at xmax VD 245cm³
• Power handling P 300W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.1Ω
• Inductance (1kHz) LE 1.3mH
• VC Diameter 63mm
• Winding height HVC 14mm
• Winding material Aluminium

Magnet

• Force factor Bl 15N/A
• Motor constant Bl/√RE 6.64N/√W
• Material Neodymium

Diaphragm

• Effective diameter 260mm
• Effective area SD 490cm²
• Moving mass MMS 49g
• Moving mass (without air load) MMD 40.9g

Suspensions

• Stiffness KMS 4.1N/mm
• Compliance CMS 244µm/N
• Equivalent volume to the compliance VAS 83L
• Mechanical resistance RMS 2.85N·s/m
• Surround material Polycotton

Dimensions

• Nominal diameter 12″
• 305mm
• Overall diameter 320mm
• Baffle cutout diameter 288mm
• Overall depth 143mm
• Flange thickness 9mm
• Mounting depth 134mm
• Volume occupied by the driver 2.2L
• Net weight 2.58kg