RCF LF18N401

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.9dB
• Frequency response 30 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 32Hz
• Mechanical quality factor QMS 6.50
• Electrical quality factor QES 0.27
• Total quality factor QTS 0.26

Large signal parameters

• Maximum linear excursion xmax 9mm
• Maximum excursion before damage xlim 26mm
• Air volume displaced at xmax VD 1080cm³
• Power handling P 1200W
• Program power Pmax 2400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.1Ω
• Inductance (1kHz) LE 2.5mH
• VC Diameter 102mm
• Winding height HVC 25mm
• Winding material Copper
• Former material Glass Fiber

Magnet

• Force factor Bl 27.8N/A
• Motor constant Bl/√RE 12.3N/√W
• Air gap height HAG 15mm

Diaphragm

• Effective diameter 395mm
• Effective area SD 1200cm²
• Moving mass MMS 201g
• Moving mass (without air load) MMD 172g

Suspensions

• Stiffness KMS 8.2N/mm
• Compliance CMS 122µm/N
• Equivalent volume to the compliance VAS 257L
• Mechanical resistance RMS 6.22N·s/m
• Spider material with silicon damping

Dimensions

• Nominal diameter 18″
• 457mm
• Overall diameter 465mm
• Baffle cutout diameter 424mm
• Overall depth 204mm
• Volume occupied by the driver 5.5L
• Net weight 9.5kg