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Bowers & Wilkins ISW4 Passive in-wall or in-ceiling subwoofer (each)

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Regular price $1,100.00 USD
Regular price $1,100.00 USD Sale price $1,100.00 USD
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High-performance hideaway bass from Bowers & Wilkins

In my book, high-quality bass is an important component of any great-sounding stereo or home theater system. But not all rooms call for a big, boxy subwoofer taking up a large chunk of valuable floor space. Cue the Bowers & Wilkins ISW4 — a passive in-wall sub that delivers high-quality bass while hiding completely out of sight.

Bowers & Wilkins ISW4 in-wall passive subwoofer

The ISW4 lets you enjoy high-quality bass without sacrificing floor space (shown as part of a Bowers & Wilkins in-wall home theater system).

Twin built-in woofers offer tight, responsive bass

The old adage of "two is better than one" can be applied to subwoofers. I personally prefer the performance of two smaller drivers that combine to move more air than a single larger woofer on its own. The resulting bass is tight and responsive — terrific for music and movies alike.

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. 

Bowers & Wilkins ISW4 Front

Contain and improve performance

This subwoofer works with a matching back-box that mounts inside your wall prior to the sub's installation. It creates a sealed acoustic chamber, which focuses and directs bass output into your listening area while reducing the amount of sound that bleeds into the adjacent room.

Requires a separate subwoofer amplifier

This sub needs to be powered with an external subwoofer amplifier, which you'll connect to your home theater receiver or pre-amp/processor. You'll use in-wall speaker wire to connect the ISW3 subwoofer to your amp of choice.

A rich history of audio excellence

Founded in England in the 1960s, Bowers & Wilkins is known worldwide for their innovative hi-fi speaker designs and their premium headphones. Crutchfield is proud to offer a diverse selection of products from this legendary audio brand.


Product highlights:

  • ideal for a discreet home theater or stereo music system
  • dual 8" hybrid paper/aramid fiber woofers
  • frequency response: 21-200 Hz (±3 dB)
  • impedance: 8 ohms
  • recommended amplification: up to 200 watts
  • designed to install between two 16" on-center wall studs or ceiling joists
  • includes paintable grille to match your décor
  • includes mounting bracket and hardware
  • overall dimensions: 10-7/16"W x 19-1/2"H x 4"D
  • weight: 21.2 lbs.
  • warranty: 5 years