RCF LF18N408

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.4dB
• Frequency response 25 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 30Hz
• Mechanical quality factor QMS 3.60
• Electrical quality factor QES 0.36
• Total quality factor QTS 0.33

Large signal parameters

• Maximum linear excursion xmax 15mm
• Maximum excursion before damage xlim 29mm
• Air volume displaced at xmax VD 1830cm³
• Power handling P 1500W
• Program power Pmax 3000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 4.3Ω
• Inductance (1kHz) LE 1.56mH
• VC Diameter 102mm
• Winding height HVC 38mm
• Winding material Copper

Magnet

• Force factor Bl 25.7N/A
• Motor constant Bl/√RE 12.4N/√W
• Air gap height HAG 15mm

Diaphragm

• Effective diameter 395mm
• Effective area SD 1220cm²
• Moving mass MMS 284g
• Moving mass (without air load) MMD 254g

Suspensions

• Stiffness KMS 10.4N/mm
• Compliance CMS 96µm/N
• Equivalent volume to the compliance VAS 193L
• Mechanical resistance RMS 14.9N·s/m

Dimensions

• Nominal diameter 18″
• 457mm
• Overall diameter 465mm
• Baffle cutout diameter 425mm
• Overall depth 224mm
• Volume occupied by the driver 5.5L
• Net weight 9.0kg