Description
The RCF LF18X401 is a rugged, high-power 18-inch ceramic magnet woofer built to deliver uncompromising performance at extreme sound pressure levels. Featuring a 4-inch inside/outside copper voice coil, triple-roll surround, and a straight corrugated cone, it achieves very low distortion, linear response, and extended low-frequency reproduction. The advanced Dual Forced Hyperventing System ensures optimal cooling and power compression control, making it ideal for demanding subwoofer applications.
Product Specifications:
Nominal Diameter: 18"
Rated Impedance: 8 ohm
Program Power: 3000 W
Power Handling (AES): 1500 W
Sensitivity: 97.5 dB
Frequency Range: 25 Hz – 1 kHz
Voice Coil & Motor
Voice Coil Diameter: 4"
Voice Coil Material: Copper
Coil Type: Inside/outside, 2 layers
Coil Length: 1.18"
Magnet Type: Ceramic
BL Factor: 26.50 T·m
Inductance (1 kHz): 0.83 mH
Mechanical
Cone: Straight fiber-loaded
Surround: Triple-roll polycotton
Max Excursion (Before Damage): 1.97"
Xmax (Linear Excursion): 12 mm
Spider: Triple (3x)
Thiele-Small Parameters
Resonance Frequency (Fs): 30 Hz
DC Resistance (Re): 5.40 ohm
Qms: 7.40
Qes: 0.31
Qts: 0.30
Mms: 215 g
Vas: 274 L
Sd: 0.120 m²
Efficiency (Half-space): 2.30%
Mounting Information
Overall Diameter: 18.31"
Baffle Cut-out (Front): 16.69"
Baffle Cut-out (Rear): 16.73"
Bolt Circle Diameter: 17.4–17.6"
Bolt Hole Diameter: 0.28"
Volume Occupied by Driver: 0.26 ft³
Depth (Height): 7.72"
Dimensions & Weight
Height: 7.72"
Diameter: 18.31"
Weight: 27.56 lbs
Shipping Info
Package (H x W x D): 10" x 20.63" x 19.45"
Shipping Weight: 33.07 lbs
Financing Options
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Military & First Responder Discounts
We're proud to support those who serve. Active-duty military, veterans, and first responders qualify for a special discount on your gear. See our Military Discount details here and how to redeem.