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    RCF L18P400 Low Frequency Transducer / Woofer

    RCF brand logo
    SKU
    L18P400
    $449.00

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    Expected January 31, 2025

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    Incredibly linear frequency response characteristics, extreme high power handling while generating the lowest harmonic distortion of any comparable 18-inch transducer within its application range. The L18P400 uses a fibre loaded cone assembly along with a high excursion triple roll, constant geometry surround. A fully optimised T-pole design generate the minimum amount of flux modulation. The T-pole also features RCF Precision's spaced gap demodulation technology, progressively braking the voice coil, providing a much smoother transition for the moving mass as it reaches its maximum excursion limits. Forced air venting system.

    The L18P400 is ideal for use in applications where incredible power handling, long excursion and perfect control is required. Ideal for high quality professional bass reflex and bass-horn systems. The transducer's low frequency extension, coupled with its extremely low generation of harmonic distortion, also makes it ideal for use within critical listening applications such as studio monitoring subwoofer systems.

    RCF L18P400 Low Frequency Transducer / Woofer Features:

    • 4-inch, fiberglass inside-outside copper voice coil.
    • 2000 Watt continuous program power handling.
    • 97.5 dB Sensitivity.
    • 25 Hz - 1 kHz Frequency range.
    • Aluminum demodulation ring.
    • Forced air ventilation and 14 mm top plate for minimum.
    • power compression.
    • Dual spider design with silicon based dampening control.
    • Triple-roll surround and corrugated straight cone geometry.

    RCF L18P400 Specifications:
    General
    Nominal Diameter: 460/18 mm/inch
    Rated Impedance: 8 ohm
    Program Power: 2000 watts
    Power handling capacity: 1000 watts
    Sensitivity: 97.5 dB
    Frequency Range: 25 - 1000 Hz
    Effective Piston Diameter: 395/15.6 mm/inch
    Max Excursion Before Damage (peak to peak): 50/2.0 mm/inch
    Minimum Impedance: 6.5 ohm
    Voice Coil Diameter: 100/4 mm/inch
    Voice Coil Material: Copper
    Voice Coil Winding Depth: 25/1.0 mm/inch
    Number of layers: 2
    Kind of layer: inside/outside
    Top Plate Thickness: 15/0.6 mm/inch
    Cone Material: No pressed pulp
    Cone Design: Straight
    Surround Material: Polycotton
    Surround Design: Triple roll

    Thiele - Small Parameters
    Resonance frequency: Fs 29 Hz
    DC resistance: Re 5.1 ohm
    Mechanical factor: Qms 7.6
    Electrical factor: Qes 0.29
    Total factor: Qts 0.28
    BL Factor: BL 24.6 T.m
    Effective Moving Mass: Mms 200 gr
    Equivalent Cas air load: Vas 340 liters
    Effettive piston area: Sd 0.122 m2
    Max. linear excursion (mathematical): Xmax 8.8 mm
    Voice - coil inductance @ 1KHz: Le 1.2 mH
    Half-space efficiency: Eff 2.63%

    Mounting Information
    Overall Diameter: 465/18.3 mm/inch
    Bolt Circle Diameter: 442-447/17.4-17.6 mm/inch
    Bolt Hole Diameter: 6.5/0.25 mm/inch
    Front Mount Baffle Cut-out: 424/16.7 mm/inch
    Rear Mount Baffle Cut-out: 425/16.7 mm/inch
    Depth: 188/7.40 mm/inch
    Volume occupied by the driver: 6.0/0.21 liters/ft3

    Shipping Information
    Net Weight: 13.3/29.3 Kg/Lbs
    Shipping Weight: 14.3/31.5 Kg/Lbs

    Each L18P400 Retail Box Includes:
    (1) RCF L18P400 Low Frequency Transducer / Woofer

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