Bowers & Wilkins (B&W) ISW-4 In-wall Subwoofer
About
The Bowers & Wilkins ISW-4 is a high-performance in-wall subwoofer designed to integrate powerful low-frequency reinforcement into discreet architectural audio systems. Equipped with dual 8-inch long-throw drivers, it is engineered to move significant air volume, producing deep, impactful bass while remaining completely hidden within a wall cavity. Paired with a dedicated external amplification system, it is ideal for custom home theaters and premium listening environments where strong sub-bass performance and invisible installation design are equally important.
Warranty
1-year manufacturer's warranty
Key Features:
- Custom install In-wall subwoofer
-
Features dual 8" Paper/Kevlar cone long-throw drivers
-
Powered by a separate audiophile-standard 250W Class D amplifier the B&W SA250 Mk2
- Dedicated Back-Box B&W BB-ISW 4
Benefits of Bowers & Wilkins (B&W) ISW-4 In-wall Subwoofer:
Bass that's heard but not seen

B&W ISW4 is a passive in-wall sub that delivers high-quality bass while hiding completely out of sight. The ISW4 employs two 8" hybrid paper/aramid fiber cones to deliver deep, accurate bass all the way down to 21 Hz. It's an excellent choice for your in-wall home theater or stereo music system in a medium- or large-sized room. The speaker is housed in its own sturdy Back Box for rock-solid stability and minimum sound bleed.
Buy Bowers & Wilkins (B&W) ISW-4 In-wall Subwoofer online at the best price in Mumbai, Delhi, Bangalore, Chennai and all across India. Enjoy expert, prompt and courteous customer service from the Ooberpad team. We will help you choose better and give you all the support you need to take the right buying decision in India.
Technical Specifications of Bowers & Wilkins (B&W) ISW-4 In-wall Subwoofer:
| Brand & Model # |
B&W ISW-4 subwoofer |
| Description | In wall subwoofer system with external rackmount amplifier |
| Drive Units |
2 x 200mm (8 in) Paper/Kevlar® cone
|
|
|
-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 8Ω (minimum 6.3Ω) |
| Dimensions |
Height: 494mm (19.5 in) Width: 264mm (10.4 in) |
| Cut-out size |
Height: 485mm (19 in) Width: 255 (10 in) |
|
Net Weight
|
6.4kg (14.1lb)
|
| Finish Frame/Grille | Semi-matt white suitable for customising or pre-painting |
| Accessories | Pre-mount kit for new construction |
| Back Box |
Box: Height: 1406mm (55.4 in) Width: 345mm (13.6 in) Depth: 85mm (3.4 in) Net Weight: 9.6kg (21.2lb) Material: MDF |
The Bowers & Wilkins ISW-4 is a high-performance in-wall subwoofer designed to integrate powerful low-frequency reinforcement into discreet architectural audio systems. Equipped with dual 8-inch long-throw drivers, it is engineered to move significant air volume, producing deep, impactful bass while remaining completely hidden within a wall cavity. Paired with a dedicated external amplification system, it is ideal for custom home theaters and premium listening environments where strong sub-bass performance and invisible installation design are equally important.
Warranty
1-year manufacturer's warranty
Key Features:
- Custom install In-wall subwoofer
-
Features dual 8" Paper/Kevlar cone long-throw drivers
-
Powered by a separate audiophile-standard 250W Class D amplifier the B&W SA250 Mk2
- Dedicated Back-Box B&W BB-ISW 4
Benefits of Bowers & Wilkins (B&W) ISW-4 In-wall Subwoofer:
Bass that's heard but not seen

B&W ISW4 is a passive in-wall sub that delivers high-quality bass while hiding completely out of sight. The ISW4 employs two 8" hybrid paper/aramid fiber cones to deliver deep, accurate bass all the way down to 21 Hz. It's an excellent choice for your in-wall home theater or stereo music system in a medium- or large-sized room. The speaker is housed in its own sturdy Back Box for rock-solid stability and minimum sound bleed.
Buy Bowers & Wilkins (B&W) ISW-4 In-wall Subwoofer online at the best price in Mumbai, Delhi, Bangalore, Chennai and all across India. Enjoy expert, prompt and courteous customer service from the Ooberpad team. We will help you choose better and give you all the support you need to take the right buying decision in India.
Technical Specifications of Bowers & Wilkins (B&W) ISW-4 In-wall Subwoofer:
| Brand & Model # |
B&W ISW-4 subwoofer |
| Description | In wall subwoofer system with external rackmount amplifier |
| Drive Units |
2 x 200mm (8 in) Paper/Kevlar® cone
|
|
|
-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 8Ω (minimum 6.3Ω) |
| Dimensions |
Height: 494mm (19.5 in) Width: 264mm (10.4 in) |
| Cut-out size |
Height: 485mm (19 in) Width: 255 (10 in) |
|
Net Weight
|
6.4kg (14.1lb)
|
| Finish Frame/Grille | Semi-matt white suitable for customising or pre-painting |
| Accessories | Pre-mount kit for new construction |
| Back Box |
Box: Height: 1406mm (55.4 in) Width: 345mm (13.6 in) Depth: 85mm (3.4 in) Net Weight: 9.6kg (21.2lb) Material: MDF |
Company Contact Information
3, Shubhanghini, 51, Milan Subway Road,
Santacruz West, Mumbai 400054
