Description

The RCF LF18X400 is a professional 18-inch low-frequency woofer designed for high-performance subwoofer and speaker cabinet applications. It features a 4-inch (102mm) copper voice coil, ceramic magnet assembly and a robust design engineered for powerful low-frequency reproduction and high power handling.

With 1,000W power handling capacity and 2,000W program power, the LF18X400 is an excellent replacement driver for compatible professional subwoofer cabinets and custom-built sound systems. RCF rates the woofer at 97.5dB sensitivity with a frequency range of 25Hz–1kHz.

Power & Performance

• Power Handling: 1,000W
• Program Power: 2,000W
• Nominal Impedance: 8 Ohms
• Sensitivity: 97.5dB
• Frequency Range: 25Hz – 1,000Hz
• Voice Coil: 4-inch / 102mm

Key Features

• 18-inch / 457mm professional woofer
• 4-inch / 102mm copper voice coil
• Single ceramic magnet assembly
• 1,000W power handling
• 2,000W program power
• 97.5dB sensitivity
• 25Hz – 1kHz frequency range
• 395mm effective piston diameter
• 50mm maximum excursion before damage
• 9mm maximum linear excursion (Xmax)
• Polycotton triple-roll surround
• Straight cone design
• Dual-layer voice coil winding
• Dual-force air ventilation system
• Dual spider with silicon-based damping control
• Designed for professional subwoofer and low-frequency applications

Mounting Specifications

• Overall Diameter: 465mm / 18.31 inches
• Bolt Circle Diameter: 442–447mm / 17.4–17.6 inches
• Bolt Hole Diameter: 7mm / 0.28 inch
• Baffle Cut-Out: 424mm / 16.69 inches
• Driver Volume: 7 litres / 0.28 ft³

Thiele-Small Parameters

• Fs: 28Hz
• Re: 5.10 Ohms
• Qms: 6.50
• Qes: 0.29
• Qts: 0.27
• BL Factor: 25.00 T·m
• Mms: 192g
• Vas: 340 litres
• Sd: 0.120m²
• Le @ 1kHz: 1.20mH

Ideal Applications

The RCF LF18X400 is ideal for professional subwoofer cabinets, replacement speaker projects, custom-built bass cabinets, PA systems, DJs, live bands, churches, event centres and professional sound reinforcement systems.

Upgrade or replace your 18-inch low-frequency driver with the RCF LF18X400 and get professional-grade power handling, deep bass performance and reliable construction.