Delta Dual 18" Passive Subwoofer 2000w RMS 18mm Birch Marine Plywood


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£699Incl. VAT Our Price
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Made from the finest 13 ply Marine Birch Plywood (with no air pockets) to ensure strength and density. The bass reflex port design enclosure is loaded with my BDP18 die-cast aluminium, high powered 18" sub frequency driver that utilizes our British Paper cones and extra cooling for better heat dissipation, high power handling capacity, and improved efficiency.

Key Features:

  • Passive Dual 18" bass-reflex PA subwoofer
  • 2000 watts RMS - 4000w Program - 8000w Peak
  • 134 dB maximum sound pressure level
  • Deep bass down to 32 Hz through 18" BDP18 custom design Woofer
  • Countersunk 3mm Extra Thick powder coated "ding proof" grille to prevent grill damage when on tour
  • Acoustic foam behind the grille to prevent moisture and dust ingression
  • 4 x Steel Handles
  • Can be used horizontally or vertically
  • 18 mm plywood cabinet with extremely durable 4 process polyurea coating
  • Easy handling through 8 ergonomic handles and stacking dimples
  • Shock-resistant front grille to protect the loudspeaker.

Finished in a highly durable polymer 4 - coat process of scratch-proof black paint, the cabinet is constructed from 18 mm (¾ ") birch marine plywood and includes a thick powder-coated perforated steel mesh grille backed with reticulated foam, and strategically placed carry handles for easy transport.

With a stunning throw and 134 Max SPL, this is the sub for touring large outdoor gigs or installing in a club where punchy bass is paramount.

The rear panel connector upward water-resistant backplate carries 2 Neutrik speakon NL4 connectors.

How do we do this price?

On paper, the first reaction is these can't be any good as they are too cheap! Join the many thousands of other PA Professionals who have taken the leap of faith, purchased PA speakers from BishopSound and left us a 5* reviews. Simply put we remove all the unnecessary overheads and supply direct.

Delivering that superb British tone that we are known for, you will never be disappointed. Live bands love these speakers as they deliver such a broad range which is especially important when the competition for BBC introducing recognition is fierce. Music must be heard in its entirety!

For an in-depth overview of its primary features reach out to me on LiveChat to discuss this product.

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.


  • Height (mm): 600
  • Width (mm): 1220
  • Depth (mm): 820
  • Net weight (kg): 79
  • Connector: 2 x Neutrik Speakon NL4 - In and Out
  • Frequency Response (Hz): 33 Hz - 200Hz å±3 dB, 27 Hz - 200 Hz -10 dB
  • Impedance (Ohms): 4 Ohms
  • Maximum SPL: 134 dB peak
  • Peak Music Power (W): 8000
  • Power RMS (W): 2000
  • Countersunk Extra Tick "ding proof" grille to prevent grill damage when on tour
  • Acoustic foam behind the grille to prevent moisture and dust ingression
  • 4 x Steel Handles
  • BDP18 Drivers Made By BishopsSound with British Paper Cones
  • Gross Weight (kg): 82
  • One-piece on a pallet



  • Nominal Overall Diameter: 460 mm
  • Nominal Voice Coil Diameter: 100 mm
  • Magnet Weight: 125 OZ
  • Flux Density: 1.42 T
  • Weight: 11.2 Kg


  • 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


  • Nominal Impedance 8 Ω
  • Musical Power 2000 W
  • Rated Power 1000 W
  • Sensitivity@1W/1m 95 d B


  • 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

Your Guarantee is for 12 months and starts from delivery date but please read on. The warranty is recorded with the BishopSound Order number which begins with a B. Please download and keep a copy of your invoice and keep it safe.

We know problems can occur from time to time so even after 1 year I am here to help. We carry parts and we treat everyone as we expect to be treated ourselves so we will work hard to get a win win.

We still help people who bought from us at Carlsbro 30 years ago with parts (if they are available) repairs and solutions. BishopSound prides itself on treating every customer as a family friend.

In short if the problem was caused by me its up to me to fix it. If you had an accident then I will try my hardest to fix it at little or no cost to you. This guarantee is in addition to, and does not affect your statutory rights or the other right of consumer purchases.

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 or

    If you have a question use this form or Live Chat and if you're interested in becoming an official distributor of BishopSound products, please get in touch below.