Delta 15" Birch Plywood Passive Subwoofer 600w RMS 8 ohm Compact Sub Bass Cabinet

BD115s

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The Delta 15″ 18mm 13-ply Marine Birch plywood subwoofer is perfect for mobile use and installation. Without doubt the best plywood subwoofer we have ever produced!

Compact yet chunky! Punchy with no annoying rattles or vibrations! Tight hard-hitting gripping bass! Easy to carry and fits in most cars.

Key Features:

  • Genuine 600w RMS Marine Plywood Subwoofer
  • Peak Power 2400w
  • Rubber Insulation Feet
  • BDP15s Cast Alloy British Designed Bishopsound driver bolted in!
  • 20mm Screw-in Inverted telescopic pole mount
  • Countersunk Extra Thick 3mm  powder-coated "ding proof" grille to prevent grill damage when on tour
  • Acoustic foam behind the grille to prevent moisture and dust ingression
  • Material = 18mm Birch Plywood painted with 4 coats textured, tough durable acrylic PU polymer paint
  • Chunky tactile steel handles
  • Compact easy to lift and transport and only 30kg

The 20mm screw-in professional inverted Top Hat in the top allows you to put a 35mm extendable pole in and add a 10",12″ or 15″ top cabinet. This fixture gives far greater stability than a standard pole and prevents annoying rattles from less professional products.

The Delta 15" sub-bass is perfect for mobile use and installation. The driver bolted inside is a BishopSound BDP15s, our stunning cast aluminium, push gold terminal, purpose-designed chassis speaker. All our drivers use first-generation British Paper cones for rigidity, not recycled newspapers.

The Delta 15 Sub delivers that tight punchy bass that is the signature of Bishopsound (previously Carlsbro). Over the last 56 years, our PA systems are often copied but rarely sound as good in performance and value as BishopSound.

Acoustic foam behind the extra thick ding proof grill prevents dust and moisture ingression.

The tone is British and designed for our music and when matched with one of our 8" 10", 12" or 15" cabinets, watch your customers come in off the streets, sit up with jaws dropped whilst listening to our amazing clarity of tone and punchy bass. No frequency is overlooked! We are British!

This system delivers that signature clarity and that tight punchy bass that is the essence of Bishopsound.

Important information about subwoofers

Subwoofers are designed to reproduce low bass audio signals between 35Hz 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.

  • Power RMS = 600Watts
  • Frequency Range = 35~150Hz
  • BDP15s Driver
  • Max SPL (dB) = 123
  • Cross Over (Hz) = <150Hz
  • Impedance (Ohm) = 8
  • Rubber Insulation Feet
  • 20mm Screw-in Inverted telescopic pole mount
  • Covers available
  • Countersunk Extra Tick "ding proof" grille to prevent grill damage when on tour
  • Acoustic foam behind the grille to prevent moisture and dust ingression
  • Power PROG (W) = 1200w (2400w Peak)
  • Connection = 2 x Speakon 4 Pole Connector
  • Material = 18mm Birch Plywood painted with 4 coats textured, tough durable acrylic PU polymer paint
  • Weight = 30kg
  • Dimensions = 44cm x 55cm x 57cm

BDP15s Driver (Fitted in this cabinet)

  • >100 dB Sensitivity (1W/1m).
  • 1200 W Program Power
  • 100 dB SPL output.
  • BRITISH Paper Cone
  • With Push-button Spring Terminals
  • Highest Quality British Cone offering increased strength, durability, and performance.
  • Nominal Voice Coil Diameter 100 mm
  • Magnet Weight 90 OZ
  • Nominal Chassis Diameter 381 mm / 15"
  • Impedance 8 ohm
  • Power Handling 600 w (A.E.S.)
  • Peak Power (6dB Crest Factor) 2400 w (A.E.S.)
  • Usable Frequency Range -6dB 38 Hz - 3.5 kHz
  • Sensitivity (1 w - 1 m) 100 dB
  • Moving Mass inc. Air Load 82.39 grams
  • Minimum Impedance Zmin 7 ohm
  • Effective Piston Diameter 381.76 mm / 15.03"
  • Peak Displacement Volume of Cone Vd 0.5 litres
  • Magnetic Gap Depth 10 mm
  • Flux Density 0.97 Tesla
  • Coil Winding Height 19 mm
  • Voice Coil Diameter 76.2 mm
  • Fs 37 Hz
  • RE Ohms 5.4 Ohms
  • Qms 6.28
  • Qes 0.414
  • Qts 0.389
  • Vas Ltr 236 litres
  • Vd litres 0.556 litres
  • CMS (mm/N) 0.228 mm/N
  • BL T/m 15.9 T/m
  • Mms (grms) 81 grams
  • Xmax (mm) 6.5 mm
  • Sd (cm2) 855 cm2
  • Efficiency 2.83%
  • Le (1k Hz) 1.52 mH
  • Push-button Spring Terminals
  • Former Material Glass Fibre
  • Voice Coil Copper
  • Magnet Material Ferrite
  • Chassis Cast Alloy
  • Cone British Made
  • Surround / Edge Termination Polyvinyl Damped Dbl. Half Roll
  • Poly-Cotton
  • Dust Dome Paper
  • Overall Diameter 381 mm
  • Width Across Flats N/A
  • Flange Height 8.89 mm
  • Baffle Hole Diameter F/M 351.79 mm
  • Baffle Hole Diameter R/M 351.79 mm
  • Gasket Supplied Front & Rear
  • Fixing Holes 8x 6.35 mm on 369.2 mm PCD
  • Depth 168.91 mm
  • Weight 10 kg
  • Shipping Weight 11 kg
  • Packing Carton Dimensions 220 x 420 x 420

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.