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Bowers & Wilkins ISW-4 In-Wall Subwoofer System

$3,198.00 inc. GST

Due to agreements in place with the manufacturer/distributor this product is unavailable for online sale which is why there is no add to cart. Please either fill out the enquiry form on this page or give one of our friendly staff members a call, we will be happy to answer any questions you may have in the best interests in securing your business


The Bowers & Wilkins ISW 4 Subwoofer System provides plenty of low down bass without the clutter of a big black box sitting somewhere in your home theatre, by installing the ISW 4 in your wall all you see is a slim rectangular mesh grill matching the rest of your flush fitting speakers throughout your room!

Bowers & Wilkins ISW 4 Key Features;

ISW 4 Subwoofer

Drive units

  • 2 x 200mm (8 in) Paper/Kevlar® cone

Frequency range

  • -6dB at 17Hz and 290Hz adjustable (EQ at A

Frequency response

  • ±3dB 21Hz – 200Hz adjustable (EQ at A)

Bass extension

  • -6dB at 17Hz (position A)
  • -6dB at 21Hz (position B)
  • -6dB at 24Hz (position C)

Power Handling

  • 200W


  • Height: 494mm
  • Width: 264mm

Cut-out size

  • Height: 485mm
  • Width: 255mm

Net weight

  • 6.4kg

Finish Frame/Grille

  • Semi-matt white suitable for customising or pre-painting

Pre-Mount kit and back box available for new home build or major renovation, please contact us for further info

Electronics Required:

SA250 Mk2 Amplifier


  • 250W rack-mount amplifier with built-in subwoofer equalisation

Amplifier inputs

  • 2x RCA Phono socket, line in
  • 2x RCA Phono socket, link out
  • 1x XLR socket, line in
  • 1x XLR socket, link out
  • 3.5mm jack – 12V trigger on/standby (overrides manual standby setting)
  • 3.5mm jack – 12V trigger equalisation movie/music

Input impedance

  • 33kΩ


  • >80dB

Rated power consumption

  • 95W – 1/8 full power
  • 30W – Idling


  • Height 100mm [88.5mm plus feet]
  • Width 430mm
  • Depth: 322mm

Net weight

  • 5.4kg

Colour = Black

Subwoofer and amplifier included in price

Download info PDF HERE

Additional Information