RCF LF18X451

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.6dB
• Frequency response 30 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 30Hz
• Mechanical quality factor QMS 6.70
• Electrical quality factor QES 0.29
• Total quality factor QTS 0.28

Large signal parameters

• Maximum linear excursion xmax 14mm
• Maximum excursion before damage xlim 27mm
• Air volume displaced at xmax VD 1680cm³
• Power handling P 1800W
• Program power Pmax 3600W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.4Ω
• Inductance (1kHz) LE 1.38mH
• VC Diameter 114mm
• Winding height HVC 34mm
• Winding material Copper

Magnet

• Force factor Bl 30.5N/A
• Motor constant Bl/√RE 13.1N/√W
• Air gap height HAG 15mm

Diaphragm

• Effective diameter 395mm
• Effective area SD 1200cm²
• Moving mass MMS 260g
• Moving mass (without air load) MMD 231g

Suspensions

• Stiffness KMS 9.43N/mm
• Compliance CMS 106µm/N
• Equivalent volume to the compliance VAS 220L
• Mechanical resistance RMS 7.31N·s/m
• Spider material with silicon damping

Dimensions

• Nominal diameter 18″
• 457mm
• Overall diameter 465mm
• Baffle cutout diameter 424mm
• Overall depth 212mm
• Volume occupied by the driver 6.5L
• Net weight 15.2kg