RCF LF18X401

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.3dB
• Frequency response 25 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 30Hz
• Mechanical quality factor QMS 7.40
• Electrical quality factor QES 0.31
• Total quality factor QTS 0.30

Large signal parameters

• Maximum linear excursion xmax 12mm
• Maximum excursion before damage xlim 25mm
• Air volume displaced at xmax VD 1440cm³
• Power handling P 1500W
• Program power Pmax 3000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.4Ω
• Inductance (1kHz) LE 0.83mH
• VC Diameter 102mm
• Winding height HVC 30mm
• Winding material Copper
• Former material Glass Fiber

Magnet

• Force factor Bl 26.5N/A
• Motor constant Bl/√RE 11.4N/√W
• Air gap height HAG 15mm

Diaphragm

• Effective diameter 395mm
• Effective area SD 1200cm²
• Moving mass MMS 215g
• Moving mass (without air load) MMD 186g

Suspensions

• Stiffness KMS 7.58N/mm
• Compliance CMS 132µm/N
• Equivalent volume to the compliance VAS 274L
• Mechanical resistance RMS 5.48N·s/m
• Spider material with silicon damping

Dimensions

• Nominal diameter 18″
• 457mm
• Overall diameter 465mm
• Baffle cutout diameter 425mm
• Overall depth 196mm
• Volume occupied by the driver 6.5L
• Net weight 12.5kg