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Bowers & Wilkins ISW-4 In-Wall Subwoofer


B&W ISW-4 In-Wall Subwoofer

Bass is a vital element of sound, which is why Bowers & Wilkins developed the ISW-4 in-wall subwoofer for custom installation purposes. The ISW-4 provides tight, controlled, yet deep bass without impacting on your living environment.

Two long-throw 200mm drivers allow the ISW-4 to move the large volumes of air needed for high-quality low-frequency output, whilst being nicely hidden away inside a wall. ISW-4 is supplied with a dedicated audiophile standard 250W Class D amplifier which has been designed to keep its cool even when the music movie action is whipping up a storm.

Bowers & Wilkins ISW-4 In-Wall Subwoofer

  • 2 x 8"Paper/Kevlar® cone drivers
  • 250w Class D digital amplifier
  • Includes custom back-box

Bowers & Wilkins ISW-4 In-Wall Subwoofer


In wall subwoofer system with external rack-mount amplifier

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 8? (minimum 6.3?)


Height: 524mm (20.6 in)

Width: 294mm (11.6 in)

Depth: 93mm (3.7 in)

Depth with grille: 114mm (4.5 in)

Cut-out size

Height: 485mm (19.9 in)

Width: 255 (10 in)

Net weight

6.4kg (14.1lb)

Finish Frame/Grille

Semi-matt white suitable for customising or pre-painting


Pre-mount kit for new construction


Height: 1406mm (55.4 in)

Width: 345mm (13.6 in)

Depth: 86mm (3.4 in)

Net Weigh

9.6kg (21.2lb)



ISW-4 Info Sheet (ISW-4_Info_Sheet.pdf, 531 Kb) [Download]

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