RCF LF18X451 - 3600W 18-inch Ceramic Low-Frequency Driver with 4.5-inch Voice Coil and 8-Ohm Impedance in Black Finish

The RCF LF18X451 is an 18-inch ceramic low-frequency driver that pushes the boundaries of power handling, efficiency, and performance. With a continuous power handling capacity of 3600W, this transducer is designed to provide deep, powerful bass with minimal distortion and low power compression. Engineered for high-output systems, the LF18X451 features an advanced fibre-loaded cone assembly paired with a high-excursion triple roll surround, enabling a peak-to-peak excursion of 54 mm. This driver's combination of strength, durability, and exceptional excursion capabilities makes it ideal for subwoofer applications that require both raw power and precision.

At the heart of the LF18X451 is a 4.5-inch fiberglass inside/outside copper voice coil, designed to provide maximum efficiency and power handling. The driver features a dual-forced hyper-venting system, which ensures optimal voice coil ventilation during extended use at high output levels, minimizing power compression and ensuring consistent performance. The driver's dual spider system, constructed with silicon-based damping control, provides excellent control during large excursions, preventing distortion and ensuring smooth operation at all frequencies. The fully optimized T-pole design minimizes flux modulation, further enhancing the driver's accuracy and overall performance.

With a frequency range from 30 Hz to 1000 Hz, the LF18X451 is capable of producing deep sub-bass frequencies while maintaining a high level of precision in mid-bass applications. The driver's 97 dB sensitivity and a BL factor of 30.5 T x m contribute to a faster and more accurate low-frequency response, making the LF18X451 a top choice for high-performance subwoofer systems. Its ceramic magnet structure ensures that it delivers high power handling and efficiency while maintaining a lightweight design, making it perfect for professional audio systems where both power and portability are key.

Features

• 3600W continuous program power handling for extreme subwoofer performance
• 4.5-inch fiberglass inside/outside copper voice coil for superior power handling and efficiency
• 97 dB sensitivity for effective sound reproduction
• 30 Hz to 1000 Hz frequency range for versatile low-frequency applications
• Peak-to-peak excursion of 54 mm for exceptional bass extension
• Dual-forced hyper-venting system for minimized power compression and efficient cooling
• Triple-roll polycotton surround for excellent control during large excursions
• BL factor of 30.5 T x m for faster and more accurate low-frequency response
• Ceramic 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 response
• 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): 3600 W
• Power handling capacity: 1800 W
• Sensitivity: 97.0 dB
• Frequency range: 30 - 1000 Hz
• Effective piston diameter: 395 mm / 15.55 inch
• Max. Excursion Before Damage: 54 mm / 2.13 inch
• Minimum Impedance (ohm): 6.8 ohm
• Voice Coil Diameter: 4.5 inch / 114 mm
• Voice Coil Winding Material: Copper
• Voice Coil Length: 34 mm / 1.34 inch
• Number of layers: 2
• Kind of layers: inside/outside
• Top Plate Thickness: 15 mm / 0.59 inch
• Cone Design: Straight
• Surround Material: Polycotton
• Surround Design: Triple roll
• Magnets: Ceramic
• Dual-force air ventilation: Yes
• Spider: 03

Thiele (small parameters)

• Resonance frequency (Fs): 30 Hz
• DC resistance (Re) (ohm): 5.40 ohm
• Mechanical factor: 6.70 Qms
• Electrical factor: 0.29 Qes
• Total factor: 0.28 Qts
• Bl factor (Bl) (T x m): 30.50 T x m
• Effective moving mass (Mms): 260.0 g
• Equivalent Cas air loaded (Vas): 220.0 liters
• Effective piston area (Sd): 0.120 m2
• Max. linear excursion (Xmax): 14 mm
• Voice coil inductance @ 1kHz (Le1k): 1.38 mH
• Half-space efficency (Eff): 1.90%

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: 424 mm / 16.69 inch
• Volume occupied by the driver: 6.5 liters / 0.26 ft3

Standard Compliance

• Safety agency: CE compliant

Size/Weight

• Height: 8.35 inches
• Diameter: 18.31 inches
• Weight: 33.51 lbs

Shipping Information

• Package Height: 10 inches
• Package Width: 20.63 inches
• Package Depth: 19.45 inches
• Package Weight: 37.48 lbs