RCF LF18N405 18-Inch 3000 Watt Woofer

Overview

The RCF LF18N405 is a high-power 18-inch woofer designed to deliver extended low-frequency performance with precision and minimal distortion. Engineered for professional audio applications, this woofer features a 4.0-inch inside/outside copper voice coil and a fibre-loaded cone assembly. The combination of a triple roll surround and a hypervented magnetic structure ensures excellent control, reduced power compression, and high efficiency. This woofer is ideal for large sound reinforcement systems and subwoofer applications, providing powerful and accurate bass frequencies.

Features:

• 18-inch low-frequency transducer
• 3000 watts continuous program power handling
• 4.0-inch inside/outside copper voice coil
• 97.5 dB sensitivity
• Frequency range: 25 Hz - 1 kHz
• Hypervented magnetic structure for reduced power compression
• Triple roll surround for enhanced durability
• Single spider with heavy cloth for excellent excursion control

Specifications:

• Nominal Diameter: 18 inches / 457 mm
• Rated Impedance: 8 ohms
• Program Power: 3000 watts
• Power Handling Capacity: 1500 watts
• Sensitivity: 97 dB
• Frequency Range: 25 Hz - 1000 Hz
• Effective Piston Diameter: 395 mm / 15.55 inches
• Max Excursion Before Damage: 58 mm / 2.28 inches
• Minimum Impedance: 6.0 ohms
• Voice Coil Diameter: 102 mm / 4.0 inches
• Voice Coil Length: 36 mm / 1.42 inches
• Number of Layers: 2
• Top Plate Thickness: 15 mm / 0.59 inches
• Cone Design: Curved
• Surround Design: Triple roll
• Resonance Frequency Fs: 30 Hz
• DC Resistance Re: 4.90 ohms
• Mechanical Factor Qms: 7.00
• Electrical Factor Qes: 0.34
• Total Factor Qts: 0.32
• BL Factor Bl: 26.50 T x m
• Effective Moving Mass Mms: 261 g
• Equivalent Cas Air Loaded Vas: 227 liters
• Effective Piston Area Sd: 0.120 m²
• Max Linear Excursion Xmax: 14 mm
• Voice Coil Inductance 1kHz Le1k: 1.70 mH
• Half-Space Efficiency Eff: 1.70%

Mounting Information:

• Overall Diameter: 465 mm / 18.31 inches
• Bolt Circle Diameter: 442-447 mm / 17.4-17.6 inches
• Bolt Hole Diameter: 7 mm / 0.28 inches
• Front Mount Baffle Cut-out: 424 mm / 16.69 inches
• Rear Mount Baffle Cut-out: 425 mm / 16.73 inches
• Volume Occupied by the Driver: 5.5 liters / 0.22 ft³
• Height: 208 mm / 8.19 inches
• Weight: 8.8 kg / 19.4 lbs