Using a Back-box Kit | Bowers & Wilkins CWM3 instruction

6. Using a Back-box Kit

Custom install back-box kits comprise a fire-proof box that can be fitted behind in-wall or ceiling speakers before the sheetrock (plasterboard) is fitted to the studs (joists). As well as enabling compliance with fire regulations, back-boxes also help optimise speaker performance by providing a defined acoustic loading volume. A minimum clearance depth of 90mm from the outer stud (joist) plane to any rear obstruction is required to fit a back-box.

Back-boxes incorporate holed side flanges that are intended to be nailed to adjoining studs (joists). All the nail holes should be used to help minimise the risk of the flange vibrating against the stud (joist) when the speaker is in use.

Speaker cable is bought into back-boxes via sealing glands. Once the cable has been brought through the gland, and the gland tightened, fire-retardant sealing mastic should be used to seal the assembly. Ensure that a generous length of cable is available in the back-box before the gland is sealed. A cable clamp adjacent to the gland provides cable strain relief.

When the sheetrock (plasterboard) is fitted over the back box a generous bead of fire-retardant sealing mastic should be applied to the back box flanges in order to seal the assembly and minimise the possibility of vibration when the speaker is in use.

Diagrams 10-12 illustrate back-box installation.

Diagram 10

Back-box stud (joists) installation

Diagram 11

Cable installation

Diagram 12

Sheetrock (plasterboard) installation

ENGLISH

CWM3 specifications

The Bowers & Wilkins CWM3 is an in-wall loudspeaker that exemplifies the company's commitment to delivering high-quality sound while integrating seamlessly into any living space. Designed for custom installation, the CWM3 offers robust performance for both music and home theater applications.

One of the main features of the CWM3 is its compact and discreet design, which allows it to blend perfectly with the wall without compromising sound quality. The flush-mount installation ensures that the speaker remains virtually invisible, making it an excellent choice for those who want a clean aesthetic in their home.

The CWM3 employs advanced technologies to deliver a remarkable audio experience. It is equipped with a 6.5-inch woven Kevlar bass driver, renowned for its ability to produce powerful low frequencies with precision and clarity. This driver is complemented by a 1-inch aluminum dome tweeter, providing a smooth and detailed high-frequency response. Together, these elements create a balanced soundstage that is engaging and immersive.

Furthermore, the CWM3 features Bowers & Wilkins' innovative FST (Fixed Suspension Transducer) technology, which enhances the mid-range frequencies and helps to create a more natural and transparent sound. This technology minimizes distortion, ensuring that vocals and instruments sound as intended, making it an ideal choice for critical listening environments.

The speaker's construction is robust, featuring a rigid enclosure design that minimizes unwanted resonance. This ensures that the sound produced is clear and free from coloration, which is crucial for achieving the high-fidelity audio that Bowers & Wilkins is known for.

Another notable characteristic of the CWM3 is its adaptability. The speaker comes with a switch that allows users to adjust the sound output based on the room's acoustics, whether it be for a larger open space or a more intimate setting. This flexibility ensures optimal performance, regardless of the installation environment.

In conclusion, the Bowers & Wilkins CWM3 is a remarkable in-wall speaker that combines aesthetic elegance with advanced audio technology. Its high-quality drivers, innovative features, and customizable performance make it an excellent choice for those looking to enhance their home audio experience without the bulk of traditional speakers. With the CWM3, Bowers & Wilkins continues to uphold its legacy of excellence in sound quality and design.