Bowers & Wilkins ISW-4 In-Wall Subwoofer System

$3,298.00 inc. GST

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

Bowers & Wilkins ISW 4
Bowers & Wilkins ISW-4 In-Wall Subwoofer System
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