RCF LF18X400

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.6dB
• Frequency response 25 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 28Hz
• Mechanical quality factor QMS 6.50
• Electrical quality factor QES 0.29
• Total quality factor QTS 0.27

Large signal parameters

• Maximum linear excursion xmax 9mm
• Maximum excursion before damage xlim 25mm
• Air volume displaced at xmax VD 1080cm³
• Power handling P 1000W
• Program power Pmax 2000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.1Ω
• Inductance (1kHz) LE 1.2mH
• VC Diameter 102mm
• Winding height HVC 25mm
• Winding material Copper

Magnet

• Force factor Bl 25N/A
• Motor constant Bl/√RE 11.1N/√W
• Material Ceramic

Diaphragm

• Effective diameter 395mm
• Effective area SD 1200cm²
• Moving mass MMS 192g
• Moving mass (without air load) MMD 163g

Suspensions

• Stiffness KMS 6.02N/mm
• Compliance CMS 166µm/N
• Equivalent volume to the compliance VAS 340L
• Mechanical resistance RMS 5.2N·s/m
• Surround material Polycotton

Dimensions

• Nominal diameter 18″
• 457mm
• Overall diameter 465mm
• Baffle cutout diameter 424mm
• Overall depth 228mm
• Flange thickness 14mm
• Mounting depth 214mm
• Volume occupied by the driver 7L
• Net weight 13.3kg