RCF LF18N405 - 3000W 18-inch Neodymium Low-Frequency Driver with 4-inch Voice Coil and 8-Ohm Impedance in Black Finish

The RCF LF18N405 is a high-performance 18-inch neodymium low-frequency driver engineered to deliver powerful and accurate bass frequencies with low distortion and minimal power compression. Designed for high-output applications, this driver excels in producing very high SPL while maintaining clarity and precision across its frequency range. With a continuous program power handling of 3000W, the LF18N405 is built to handle demanding subwoofer applications where both power and efficiency are critical. Its robust construction and advanced design features ensure remarkable strength and control during large excursions.

At the heart of the LF18N405 is a 4-inch copper voice coil wound inside and outside for superior power handling and efficiency. The fiber-loaded cone assembly, combined with a large triple-roll surround, enhances the driver's strength and excursion capabilities, allowing it to produce deep, impactful bass without compromising on performance. The driver also features a single spider system designed with heavy cloth material to ensure excellent control during extreme excursions. The fully optimized T-pole design reduces flux modulation, which minimizes distortion and improves transient response, ensuring clean, accurate bass reproduction.

The LF18N405 incorporates a dual-forced air venting magnetic structure, ensuring efficient voice coil ventilation to minimize power compression and enhance long-term performance. With a maximum excursion of 58 mm and a BL factor of 26.5 T x m, this driver excels in delivering fast, accurate low-frequency response, making it perfect for high-performance subwoofer systems. Whether for professional sound reinforcement or large-scale live events, the LF18N405 is designed to provide deep, distortion-free bass at high output levels.

Features

• 3000W continuous program power handling for high-output subwoofer performance
• 4-inch inside/outside copper voice coil for superior power handling and efficiency
• 97.5 dB sensitivity for effective sound reproduction
• 25 Hz to 1000 Hz frequency range for deep and accurate low-frequency response
• Peak-to-peak excursion of 58 mm for exceptional bass extension
• Dual-forced air venting system for efficient cooling and minimized power compression
• Triple-roll polycotton surround for excellent control during large excursions
• BL factor of 26.5 T x m for faster and more accurate low-frequency response
• Neodymium magnet structure for high power-to-weight ratio and improved efficiency
• Resonance frequency of 30 Hz and maximum linear excursion of 14 mm for deep, controlled bass
• CE compliant for safety and reliability in professional installations

Specifications

General Specifications

• Nominal Diameter: 18 inch / 457 mm
• Rated Impedance: 8 ohm
• Program Power (watt): 3000 W
• Power handling capacity: 1500 W
• Sensitivity: 97.0 dB
• Frequency range: 30 - 1000 Hz
• Effective piston diameter: 395 mm / 15.55 inch
• Max. Excursion Before Damage: 58 mm / 2.28 inch
• Minimum Impedance (ohm): 6.0 ohm
• Voice Coil Diameter: 4.0 inch / 102 mm
• Voice Coil Winding Material: Copper
• Voice Coil Length: 36 mm / 1.42 inch
• Number of layers: 2
• Kind of layers: inside/outside
• Top Plate Thickness: 15 mm / 0.59 inch
• Cone Design: Curved
• Surround Material: Polycotton
• Surround Design: Triple roll
• Magnets: Neodymium
• Hypervented magnetic structure: Yes
• Spider: 01

Thiele (small parameters)

• Resonance frequency (Fs): 30 Hz
• DC resistance (Re) (ohm): 4.90 ohm
• Mechanical factor: 7.00 Qms
• Electrical factor: 0.34 Qes
• Total factor: 0.32 Qts
• Bl factor (Bl) (T x m): 26.50 T x m
• Effective moving mass (Mms): 261.0 g
• Equivalent Cas air loaded (Vas): 227.0 liters
• Effective piston area (Sd): 0.120 m2
• Max. linear excursion (Xmax): 14 mm
• Voice coil inductance @ 1kHz (Le1k): 1.70 mH
• Half-space efficency (Eff): 1.70%

Mounting Information

• Overall diameter: 465 mm / 18.31 inches
• Bolt circle diameter: 442-447 mm / 17.4-17.6 inch
• Bolt hole diameter: 7 mm / 0.28 inch
• Front mount baffle cut-out: 424 mm / 16.69 inch
• Rear mount baffle cut-out: 425 mm / 16.73 inch
• Volume occupied by the driver: 5.5 liters / 0.22 ft3

Standard Compliance

• Safety agency: CE compliant

Size/Weight

• Height: 8.19 inches
• Diameter: 18.31 inches
• Weight: 19.4 lbs

Shipping Information

• Package Height: 10.04 inches
• Package Width: 19.49 inches
• Package Depth: 20.67 inches
• Package Weight: 22.05 lbs