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B&W ISW4 In-Wall Subwoofer - Hi-Fi Centre
B&W ISW4 In-Wall Subwoofer - Hi-Fi Centre
B&W ISW4 In-Wall Subwoofer installed in a modern living room.
B&W ISW4 In-Wall Subwoofer - Hi-Fi Centre
B&W ISW4 In-Wall Subwoofer - Hi-Fi Centre
B&W ISW4 In-Wall Subwoofer installed in a modern living room.

B&W

B&W ISW4 In-Wall Subwoofer

SKU: ISW4

$1,200.00
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Need big sound, slamming bass and audiophile extension, but don’t want to see where it comes from? The ISW-4 in-wall subwoofer is for you. Two long-throw 200mm (8in) drivers allow it to move the large volumes of air needed for high-quality low-frequency output. The speaker is housed in its own sturdy back box for rock-solid stability and minimum sound bleed, and is powered by the SA250, a separate audiophile-standard 250W Class D amplifier.

  • Dual 8" Long-Throw Drivers: Delivers powerful, dynamic bass by moving large volumes of air—ideal for both cinematic soundtracks and immersive music listening.
  • Hidden In-Wall Design: Designed to blend seamlessly into walls, offering clean aesthetics without sacrificing low-frequency impact.
  • Sturdy Back Box Enclosure: Ensures rock-solid cabinet stability, minimizes vibration, and reduces sound bleed to adjacent rooms.
  • SA250 Amplifier Compatibility: Engineered to work in tandem with the SA250 250W Class D amplifier (sold separately), ensuring precise, high-efficiency bass output.
  • Optimized for Seamless Home Integration: Purpose-built for flush in-wall mounting, making it a premium choice for hidden, high-performance home audio systems.
Bowers & Wilkins is a British company that specializes in high-end audio equipment, including loudspeakers, headphones, and wireless speakers. The company was founded in 1966 in Worthing, England, and has since become a well-known brand in the audio industry, known for its innovative designs and high-quality sound. Bowers & Wilkins' products are used in a variety of settings, from home entertainment systems to professional recording studios. The company's loudspeakers have been used in some of the world's most famous recording studios, including Abbey Road Studios in London and Skywalker Sound in California.

All orders are processed within 48 hours from date of order.

We offer Free Ground Shipping on all orders regardless of size.  

  • If you would like to receive your order quicker you can request Express shipping during Check-Out in the Comments section.  Additional charges will apply.
  • In-stock items are shipped from our Vancouver warehouse and will reach major Canadian cities in 5-7 business days.
  • Items not in stock will either ship from one of our manufacturer partners' warehouses or in rare cases first must be sent to Vancouver and then to you.  

What amplifier is required to power this subwoofer?

This subwoofer is designed to be powered by the Bowers & Wilkins SA250 Class D amplifier, which provides 250 watts of optimized power, ensuring stable, clean bass performance across a wide dynamic range.

Does the ISW4 include its own back box?

Yes. The ISW4 comes pre-mounted in a robust, purpose-built back box that stabilizes the subwoofer, reduces vibrations, and helps contain the sound within the room.

B&W ISW4 In-Wall Subwoofer installed in a modern living room.

Powerful Low-Frequency Performance in Hidden Spaces

Bowers & Wilkins in-wall and in-ceiling subwoofers deliver deep, impactful bass while remaining completely out of sight. Designed to complement your main speaker system, these subs enhance music and movie experiences by filling in the low-end detail that completes full-range sound—without compromising room aesthetics.

Flexible series speakers of home audio - B&W - HiFi Centre

Engineered for Discreet Integration

Built to disappear into your architecture, these subwoofers feature slim-profile, installation-friendly designs that fit neatly behind walls or above ceilings. Ideal for rooms where floor space is limited or visual minimalism is a priority, they offer high-performance audio with virtually no visual footprint.

A pair of B&W CWM663 In-Wall Speakers in a modern living room.

True Sound, No Compromise

Crafted by the same expert engineers behind Bowers & Wilkins' iconic loudspeakers, these subwoofers are precision-tuned to reproduce bass exactly as the artist intended. Whether supporting a dedicated home theatre or multi-room system, they add dimension and realism to every note and cinematic moment.

Why Shop at Hi-Fi Centre

Whether you're an audiophile or just getting started, we'll help you find the perfect setup with expert advice and hands-on demos. Here's why music lovers and home theatre enthusiasts choose us:

  • Curated Selection of Premium Brands - The world's best high-fidelity audio and home theatre gear, all in one place.
  • Professional Guidance & Custom Demos - Experience premium sound firsthand with help from our expert staff.
  • Exceptional Customer Service - We're here to help before, during, and after your purchase.
  • An Experience Like No Other - Step into our showroom and hear the difference for yourself.

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