The RCF LF18G401 is a high-performance 18-inch ceramic woofer built for smooth frequency response and powerful low-end performance in demanding sound reinforcement applications. It features a 4-inch copper voice coil, triple-roll surround, and polycotton suspension for maximum excursion and durability. With a 98 dB sensitivity and 1800W program power handling, the LF18G401 delivers punchy, tight bass with impressive efficiency.
Product Specifications:
Nominal Diameter: 18″
Rated Impedance: 8 ohm
Program Power: 1800 W
Power Handling (AES): 900 W
Sensitivity: 98 dB
Frequency Range: 30 Hz – 1 kHz
Voice Coil & Motor
Voice Coil Diameter: 4″
Voice Coil Material: Copper
Coil Type: Inside/outside, 2 layers
Coil Length: 0.91″
Magnet Type: Ceramic
BL Factor: 24.60 T·m
Inductance (1 kHz): 1.80 mH
Mechanical
Cone: Straight fiber-loaded
Surround: Triple-roll polycotton
Max Excursion (Before Damage): 1.97″
Xmax (Linear Excursion): 9 mm
Spider: Triple (3x)
Thiele-Small Parameters
Resonance Frequency (Fs): 33 Hz
DC Resistance (Re): 4.80 ohm
Qms: 7.60
Qes: 0.30
Qts: 0.29
Mms: 182 g
Vas: 268 L
Sd: 0.120 m²
Efficiency (Half-space): 3.09%
Mounting Information
Overall Diameter: 18.31″
Baffle Cut-out (Front & Rear): 16.69″
Bolt Circle Diameter: 17.4–17.6″
Bolt Hole Diameter: 0.28″
Volume Occupied by Driver: 0.24 ft³
Depth (Height): 7.72″
Dimensions & Weight
Height: 7.72″
Diameter: 18.31″
Weight: 28.66 lbs
Shipping Info
Package (H x W x D): 10.24″ x 19.69″ x 20.47″
Shipping Weight: 33.07 lbs
