RCF L18P400 High-Efficiency Ceramic Woofer with Optimized Flux Control - 18"

The RCF L18P400 is a robust 18-inch ceramic woofer engineered for precision low-frequency performance and extreme reliability in professional subwoofer systems. It features a 4-inch inside/outside copper voice coil, triple-roll surround, and corrugated straight cone for low distortion and high excursion. Designed with an aluminum demodulation ring and advanced T-pole geometry, the L18P400 minimizes flux modulation and ensures smooth, controlled movement even at maximum excursion.

Product Specifications:

Nominal Diameter: 18"

Rated Impedance: 8 ohm

Program Power: 2000 W

Power Handling (AES): 1000 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: 0.98"

Magnet Type: Ceramic

BL Factor: 24.60 T·m

Inductance (1 kHz): 1.20 mH

Demodulation Ring: Yes (Aluminum)

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): 29 Hz

DC Resistance (Re): 5.10 ohm

Qms: 7.60

Qes: 0.29

Qts: 0.28

Mms: 200 g

Vas: 340 L

Sd: 0.120 m²

Efficiency (Half-space): 2.63%

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: 0.24 ft³

Depth (Height): 8.11"

Dimensions & Weight

Height: 8.11"

Diameter: 18.31"

Weight: 29.76 lbs

Shipping Info

Package (H x W x D): 10.63" x 20.47" x 19.69"

Shipping Weight: 34.17 lbs