Bowers & Wilkins ISW-3 In-Wall Sub & Amp


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Bowers & Wilkins are a world-famous name within the hifi community and industry, having developed a vast number of loudspeaker models throughout the years and, winning the hearts of audio lovers and critics alike. B&W specialise in maintaining the balance between sound quality and price point, meaning that value for money and true quality is always at the forefront of the company's design process. 

Their range of in ceiling, in wall and outdoor speakers follow this design philosophy and often incorporate truly innovative quirks and features

Both music and movies benefit greatly from extended bass performance, but a conventional subwoofer can compromise the decor of your room - step up to the B&W ISW-3 in-wall subwoofer and matching SA250 Mk2 amplifier and enjoy tight, tuneful bass without any visible subwoofer in your home.

B&W ISW3 features twin 165mm paper/ Kevlar cone drivers in a balanced design to eliminate vibrations, giving a frequency range of 21Hz to 222Hz, adjustable via the 250W class D rack mounting SA250 Mk2 amplifier.

Sold as a single unit - includes required SA250 amplifier. 


Drive units   2 x 165mm (6.5in)
Paper/Kevlar® cone 
 Frequency range -6dB at 21Hz and 222Hz
adjustable (EQ at A) 
 Frequency response  ±3dB 27Hz - 120Hz
adjustable (EQ at A)
 Bass extension -6dB at 21Hz (position A)
-6dB at 25Hz (position B)
-6dB at 29Hz (position C) 
 Maximun Amp Power 250W 
 Impedance Nominal 8Ω (minimum 6.3Ω) 
 Dimensions Width: 330mm (12.9in)
Length: 470mm (18.5in)
Depth: 237mm (9.3in) 
 Volume 89620mm3 
 Net weight 12.5kg 
Electronics (mandatory)  SA250 Mk2 

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Providing your item is in stock, the order is usually dispatched within 24 hours. Please remember that postage and packing is completely free for orders over £50*. Out of stock items will be dispatched as soon as they become available, out of stock items can take between 4 to 21 days for dispatch.

Deliveries usually take 1-3 working days. The majority of orders are sent via our couriers'; Interlink Express on a next-day-delivery service. Smaller, low value or light-weight items are normally posted using Royal Mail Recorded or Royal Mail Special Delivery.

Once your product has been dispatched, you will be notified via email and sent a unique consignment number, you can use this number at to check the status of your delivery. If you have provided a mobile telephone number, Interlink's Predict service will notify you by text (and email) of a one-hour delivery window. If the window they suggest is inconvenient, you can change the date of delivery to a later one via text or email.

*We ship free of charge to mainland UK addresses, excluding the Scottish Highlands or 'Out-Of-Reach' Scottish locations. Please consult the post-codes below to see if your location falls within this category. If you are still unsure, please contact us on 01432 354921. We also ship to Northern Ireland, Channel Islands, Scilly Isles, Scottish Isles and Scottish Highlands, however delivery to these locations will incur a charge and can only be sent via a 2-day service.

Shipping CostsMainland UK (Next-Day)Offshore/Out-of-reach (2-day)Northern Ireland, Channel Islands, Isle of Man, Scottish Islands, Scilly IslandsRepublic of Ireland (2-day)
Under £50 Orders £7.50 £12.50 £15.00
Over £50 Orders FREE £19.99 £29.99
Surcharge Orders £50.00 £69.99 £79.99
Saturday Delivery £12.99 N/A N/A
Sunday Delivery £12.99 N/A N/A
Saturday by 12 Delivery £35 N/A N/A


Post codes exempt from the free delivery service include:

Scottish Highlands Post Codes: AB30-38, AB41-42, AB44-56, FK17-99, G83, IV1-28, IV30-39, IV52-54, IV63, KW1-14, PA21-33, PA34-40, PH15-26, PH31-41, PH49-50
Islands Post Codes: HS1-9, IV40-51, IV55-56, KA27-28, KW15-17, PA20, PA41-49, PA60-78, PH42-44, ZE1-3
Northern Ireland: All BT postcodes
Channel Islands Post Codes: JE, GY
Scilly Isles Post Codes: TR21, TR22, TR23, TR24, TR25