18" Subwoofer Driver Cast Alloy 1000w RMS With Faston Terminals Woofer - BDP18 (4 & 8 Ohm)


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A 1000W workhorse that delivers a stunning performance in folded horn cabinets with medium or longhorn paths. Perfectly suitable for scoop bins bass reflex and 4th and 6th order bandpass cabinets. This is our best selling replacement 18" subwoofer driver. Made from professional grade materials the BDP18 features Kapton coils, ferrite magnets, BRITISH paper cones with rolled cloth edge and push terminals.

We have a few B-Grade 18" 8 ohm . The drivers are perfect but the boxes are very tatty so we do not feel comfortable selling them as new.

Download the spec sheet to see that this driver is appropriate for applications as diverse as scoop bins, conventional reflex cabinets, and horn-loaded systems

  • Nominal Impedance 8Ω or 4Ω
  • Program Power 2000 W
  • Rated Power 1000 W RMS
  • Sensitivity@1W/1m 99dB

If you like the Fane Colossus 18XB then you will adore the BishopSound BDP18 is a higher specification.  

Designed specifically to provide powerful and accurate bass frequencies with minimal distortion and power compression. This 18" Sub Speaker is ideal for use in systems and where earth-shaking subwoofers are needed.

The BDP18 is a real workhorse and is the optimum choice for top of the range sub-bass systems where the ability to take punishment in the most demanding situations.

The BDP18 is Suitable for sound reinforcement in a variety of enclosure types as it allows enclosure designers considerably more freedom for specialized loading techniques without having to make exceptions for physical characteristics or power handling limitations which are typically the result of less reliable designs.

    Read more in the technical section.


    General Characteristics

    • Nominal Overall Diameter: 460 mm
    • Nominal Voice Coil Diameter: 4 Inch 102 mm
    • Magnet Weight: 125 OZ
    • Flux Density: 1.42 T
    • Weight: 11.2 Kg

    Thiele-Small Parameters

    • Resonance Frequency Fs 34.8 Hz
    • Mechanical Q Factor Qms 11.48
    • Electrical Q Factor Qes 0.57
    • Total Q Factor Qts 0.543
    • Mechanical Moving Mass Mms 202.6 g
    • Mechanical Compliance Cms 103.05 um/N
    • Force Factor BL 20.87 Wb/m
    • Equivalent Acoustic Volume Vas 219.7 It.
    • Maximum Linear Displacement Xmax ±7 mm
    • Reference Efficiency ηo 1.575 %
    • Diaphragm Area Sd 122.54 Cm2
    • Losses Electrical Resistance Res Ω
    • Voice Coil Inductance@ 1K Hz LE m H

     Electrical Characteristics

    • Nominal Impedance 4 or 8 Ω
    • Musical Power 2000 W
    • Rated Power 1000 W
    • Sensit
    • Peak Power (6dB Crest Factor) 4000 w (A.E.S.)
    • Usable Frequency Range -6dB 35 Hz - 1.0 kHz
    • Sensitivity@1W/1m 99 dB

     Construction Characteristics

    • Magnet Ferrite
    • Voice Coil Winding Copper
    • Voice Coil Former Kapton
    • Cone Paper - Made In England
    • Surround Treated Cloth
    • Dust Dome Paper
    • Basket Die-Cast Aluminium

    BishopSound Limited Lifetime Guarantee

    Effective on all purchases from 1st January 2021

    With a returns rate of less than 1% we are proud to offer the BishopSound Lifetime Guarantee at no extra cost to you

    BishopSound Limited will undertake to guarantee the product will be free from defective workmanship and materials for the reasonable life of the product.

    BishopSound Limited will at its discretion and expense either repair the defect using new or refurbished parts, or replace the Product with a new or re-manufactured Product of a reasonable equivalent. In all instances BishopSound Limited’s liability will not exceed the original Purchase Price.

    If we find a genuine fault or defect in your item that shouldn’t be there based on normal use, then we’ll repair or replace it for free– no questions asked. But, if that speaker has been unloved or beaten to within an inch of its life, then it might be time to buy a new one! In any case, we’ll review each case and will let you know if we can fix or replace it.

    The warranty stated above is the sole and exclusive remedy and BishopSound Limited’s performance shall constitute full and final satisfaction of all obligations, liabilities and claims with respect to the Product. In any event, BishopSound Limited shall not be liable for and consequential, incidental, economic, property, bodily injury or personal injury damage arising from the product, any breach of the warranty or otherwise.

    This Warranty applies to the first end-user purchaser, and only when purchased from BishopSound Direct or an authorized BishopSound Limited Dealer/Distributor on the UK Mainland listed on our website.

    Additional Limitations and Exclusions from Warranty Coverage: The warranty described above is non-transferable, applies only to the Product purchased, does not include installation of any repaired or replaced Product, does not include damage to any allied or associated equipment which may result for any reason from use with this Product, and does not include labour or parts caused by accident, disaster, negligence, improper installation, broken warranty seals, misuse (e.g. over driving the amplifier or speaker, unstable, unprotected or badly earthed power sources, excessive heat or cold or humidity or inadequate ventilation), or from service or repair which has not been authorized by BishopSound Limited.

    The end-user purchaser is liable for the cost of transportation and return of the Product in the original packaging. Any damages incurred during transport are the cost and responsibility of the end-user purchaser.

    When purchasing BishopSound Limited products, please keep your receipt of purchase safe and retain all the original packaging, as this validates your warranty.

    How To Claim

    To qualify for the Lifetime warranty, in the first instance you must contact BishopSound Limited showing proof of purchase and the product code. You must be in possession of the original packing as this has the Serial Number printed on it.You will be asked for the serial number and given a return authorization number (RAN), which is required to progress with your warranty claim.

    Any decision made by BishopSound Limited regarding any Lifetime Warranty claim is full and final.

    This warranty takes effect from the 1st January 2021 onward. Goods purchased prior to this date were sold with the 12 month warranty which still stands.

    Only branded BishopSound Limited Products are included in the Lifetime Guarantee:

    For more information, please see our Terms & Conditions

      Get in touch with BishopSound today for professional and friendly advice. Alternatively, you can call us on 01765 698 233 or 07973 223949. If you want to send a direct email please use andrew@bishopsound.com or victoria@bishopsound.com.

      If you have a question for Andrew use this form or Live Chat for a fast reply.