RCF LF18X451 High-Power Ceramic Woofer - 18"

The RCF LF18X451 is a high-performance 18-inch woofer crafted for extreme power, clarity, and low distortion in sub-bass applications. Designed with a 4.5-inch fibreglass inside/outside copper voice coil and ceramic magnet, it handles up to 3600W of continuous program power. A triple-roll surround and fiber-loaded cone deliver precise movement and deep lows, while the dual forced hyperventing system ensures excellent thermal management. This woofer is ideal for demanding professional sound systems where power and accuracy are critical.

Product Specifications:

Nominal Diameter: 18"

Rated Impedance: 8 ohm

Program Power: 3600 W

Power Handling (AES): 1800 W

Sensitivity: 97.0 dB

Frequency Range: 30 Hz – 1 kHz

Voice Coil & Motor

Voice Coil Diameter: 4.5"

Voice Coil Material: Copper

Coil Type: Fiberglass inside/outside, 2 layers

Coil Length: 1.34"

Magnet Type: Ceramic

BL Factor: 30.50 T·m

Inductance (1 kHz): 1.38 mH

Mechanical

Cone: Straight, fiber-loaded

Surround: Triple-roll polycotton

Max Excursion (Before Damage): 2.13"

Xmax (Linear Excursion): 0.55"

Dual Silicone Spider System: Yes

Thiele-Small Parameters

Resonance Frequency (Fs): 30 Hz

DC Resistance (Re): 5.40 ohm

Qms: 6.70

Qes: 0.29

Qts: 0.28

Mms: 260 g

Vas: 220 L

Sd: 0.120 m²

Efficiency (Half-space): 1.90%

Mounting Information (Inches)

Overall Diameter: 18.31"

Bolt Circle Diameter: 17.4–17.6"

Bolt Hole Diameter: 0.28"

Baffle Cut-out (Front & Rear): 16.69"

Driver Depth (Height): 8.35"

Volume Occupied by Driver: 0.26 ft³

Dimensions & Weight

Height: 8.35"

Diameter: 18.31"

Weight: 33.51 lbs

Shipping Info

Package (H x W x D): 10" x 20.63" x 19.45"

Shipping Weight: 37.48 lbs