RCF LF18Y488

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

Thiele & Small parameters

• Resonance frequency (free air) fS 32.6Hz
• Mechanical quality factor QMS 7.60
• Electrical quality factor QES 0.30
• Total quality factor QTS 0.29

Large signal parameters

• Maximum linear excursion xmax 9mm
• Maximum excursion before damage xlim 25mm
• Air volume displaced at xmax VD 1080cm³
• Power handling P 900W
• Program power Pmax 1800W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 4.8Ω
• Inductance (1kHz) LE 2.4mH
• VC Diameter 102mm
• Winding height HVC 23mm
• Winding material Copper
• Former material Glass Fiber

Magnet

• Force factor Bl 24.6N/A
• Motor constant Bl/√RE 11.2N/√W
• Air gap height HAG 12mm

Diaphragm

• Effective diameter 395mm
• Effective area SD 1200cm²
• Moving mass MMS 182g
• Moving mass (without air load) MMD 153g

Suspensions

• Stiffness KMS 7.63N/mm
• Compliance CMS 131µm/N
• Equivalent volume to the compliance VAS 268L
• Mechanical resistance RMS 4.9N·s/m
• Spider material with silicon damping

Dimensions

• Nominal diameter 18″
• 457mm
• Overall diameter 465mm
• Baffle cutout diameter 424mm
• Volume occupied by the driver 7L
• Net weight 13.0kg