RCF LF12P903

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.7dB
• Frequency response 40 - 2000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 47Hz
• Mechanical quality factor QMS 4.20
• Electrical quality factor QES 0.24
• Total quality factor QTS 0.23

Large signal parameters

• Maximum linear excursion xmax 7mm
• Maximum excursion before damage xlim 18mm
• Air volume displaced at xmax VD 371cm³
• Power handling P 500W
• Program power Pmax 1000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.7Ω
• Inductance (1kHz) LE 1.06mH
• VC Diameter 76mm
• Winding height HVC 19mm
• Winding material Copper
• Former material Glass Fiber

Magnet

• Force factor Bl 22.1N/A
• Motor constant Bl/√RE 9.24N/√W
• Air gap height HAG 10mm

Diaphragm

• Effective diameter 260mm
• Effective area SD 530cm²
• Moving mass MMS 70g
• Moving mass (without air load) MMD 61.1g

Suspensions

• Stiffness KMS 6.06N/mm
• Compliance CMS 165µm/N
• Equivalent volume to the compliance VAS 65L
• Mechanical resistance RMS 4.92N·s/m

Dimensions

• Nominal diameter 12″
• 305mm
• Overall diameter 320mm
• Baffle cutout diameter 284mm
• Volume occupied by the driver 2.6L
• Net weight 7.0kg