Bowers & Wilkins ISW-4

While the ISW-4 is primarily designed for in-wall mounting, its flexible design allows for ceiling installation as well. Ensure your ceiling structure can support the weight and depth of the unit before proceeding.

Yes, the ISW-4 is a passive subwoofer, meaning it does not have a built-in amplifier. You will need to pair it with a dedicated subwoofer amplifier, such as the Bowers & Wilkins SA250, to power the dual drivers effectively.

The dual 8-inch long-throw drivers work in tandem to move more air than a single driver, resulting in deeper, more authoritative bass. This configuration helps the subwoofer maintain clarity and impact even at higher volumes.

The ISW-4 is engineered for rigid, discreet integration to minimize unwanted resonance. However, for the best performance and to prevent wall rattling, ensure the unit is securely mounted and the surrounding wall cavity is properly braced.

The ISW-4 is capable of delivering powerful low frequencies suitable for most home theater setups. For very large rooms, you might consider installing two units to ensure even bass distribution and increased output.