Delta 18" Birch Plywood Passive 1000w RMS Touring Grade Subwoofer

BD118S

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£499Incl. VAT Our Price
£599Incl. VAT Typically This represents the average price across other brands that offer the same level of functionality and features as this product

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100% 18mm 13 ply Birch Marine Plywood - 1000w RMS!

Each passive cabinet delivers 1000w RMS (4000w Peak) at 8 Ohm and goes down to 37 Hz - with a max SPL of 134dB. We make the cast alloy 1kw driver so we control the performance of this subwoofer to perfection!

The Delta 18″ Subwoofer we believe provides the tightest and most defined bass frequency response available in the UK today. We make the box and the driver and the driver is the BDP18, probably the most reliable 18" cast alloy driver in the UK today with over 5000 pieces sold and only 6 have come back for a re-cone.

The cabinet is finished in 4 coats of Heavy Duty black splatter PU paint it will withstand all the knocks and scrapes gathered through touring. The box has been tuned to perfection after 30 years of manufacture and it sounds as punchy and stomach punchy today as it ever did! No crossover is fitted in the box as all users should use a speaker management processor.

Join hundreds of delighted touring companies, live bands, Dj's, Club Installers and houses of worship in celebrating the sound from this subwoofer.

Glastonbury Festival used these boxes in 2019 to great acclaim!

Be it On-Tour, a Nightclub or House of Worship, the low-frequency response will move the audience during reproduction of the spoken word, recorded and live music.

Be it Abide with Me, Boogie Wonderland or Jamming Punchy bass rhythms have never sounded so good!

Important information about subwoofers

Subwoofers are designed to reproduce low bass audio signals between 30Hz and 150Hz. Driving them with full frequencies will cause permanent damage, so they should only be operated with a passive low-pass filter, a crossover network, or an active electronic crossover or speaker management system.


  • 18mm 13 ply Marine Birch Plywood Cabinet
  • Covered with 4 coats of BishopSound PU heavy-duty chip-proof paint
  • Extra Thick ding proof metal grill
  • Acoustic Foam Behind Grill to Prevent Water and Dust Ingression
  • System Type 18" Passive (Subwoofer)
  • Loaded with BishopSound BDP18
  • Frequency Range 34~150 Hz
  • Impedance 8 OHM
  • Power RMS (W) 1000
  • Power PROG (W) 2000 (4000w Peak)
  • LF (Power/Sensitivity) 1000w/134dB
  • Max SPL (dB) 134dB
  • Cross over (Hz) +/-100hz
  • Connection 4 Pole connector x 2 (in and out)
  • Water-resistant Speakon upload backplate
  • Cabinet size 58*67*73 cm
  • Carton size 63*72*78 cm
  • Product Weight 42Kg
  • Top Hat 20mm threaded Inverted in top of the cabinet for pole mount
  • BISHOPSOUND BDP18 SUB BASS WOOFER 18″ 1000W RMS

    GENERAL CHARACTERISTICS

    Nominal Overall Diameter: 460 mm
    Nominal Voice Coil Diameter: 100 mm
    Magnet Weight: 125 OZ
    Flux Density: 1.42 T
    Weight: 11.2 Kg
    THIELE-SMALL PARAMETERS

    Voice Coil DC Resistance Re 5.6 Ω
    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 8 Ω
    Musical Power 2000 W
    Rated Power 1000 W
    Sensitivity@1W/1m 95 d B
    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.