Bowers & Wilkins CWM 7.4 S2 In-Wall Speaker

Bowers and Wilkins CWM 7.4 S2 – 700 Series Sound, Built Into the Wall

The CWM 7.4 S2 is a high-performance in-wall loudspeaker from Bowers and Wilkins’ 700 Series S2 range, designed to serve as the left, centre and right channels of a hidden home theatre or as a premium in-wall music speaker. It pairs a 25mm Carbon Dome tweeter with two 130mm Continuum cone bass/midrange drivers in an integrated back-box design that controls the cavity behind the wall.

Architectural speakers live or die by whether they sound like real loudspeakers. The CWM 7.4 S2 uses the same driver technologies as the 705 S2 and 706 S2 cabinet speakers, so a theatre built around it keeps the tonal character of the 700 Series while the hardware disappears behind a paintable, near-flush grille.

Key features

• In-wall LCR speaker for hidden home theatres and premium installs
• 25mm Carbon Dome tweeter for detailed, low-distortion treble
• Two 130mm Continuum cone bass/midrange drivers
• Integrated back box controls the rear cavity for consistent bass
• Driver technology shared with the 700 Series S2 cabinet range
• Slim, paintable grille sits near-flush with the wall surface
• QuickDogs fixing system speeds up installation
• Sold as a single speaker – order three for an LCR front stage

Why the back box matters

An ordinary in-wall speaker fires its rear energy into whatever cavity the builder left behind the plasterboard, so bass response varies from wall to wall and sound leaks into the next room. The CWM 7.4 S2’s integrated enclosure defines the air volume the drivers work against, which makes performance predictable from seat to seat and project to project, and reduces transmission to adjoining spaces. For installers, it removes the guesswork; for listeners, it is the difference between in-wall sound and hi-fi sound.

Building a system around it

Three CWM 7.4 S2 speakers behind or beside the screen form a perfectly matched front stage. Add CWM or CCM Series surrounds and in-ceiling channels for Atmos, plus a subwoofer from the 600 or 700 Series ecosystem, and the theatre keeps one consistent voice from front to back. The speaker is passive, so budget for a capable AV receiver or power amplifier, and have cut-out and placement planned before first fix.

Who the CWM 7.4 S2 suits

Choose the CWM 7.4 S2 when the brief is a serious cinema or media room with no visible speakers: media walls, dedicated theatres and architect-led living spaces. It is a professional-install product, best specified with the rest of the system rather than bought as an afterthought.

Installation notes

The CWM 7.4 S2 installs into a wall cut-out with its back box defining the cavity, using the QuickDogs clamping system to pull the frame tight to the plasterboard. Plan the three front channels at equal height with tweeters near ear level for the seated row, and keep studs and services clear of the cut-out positions at first fix. Because the grille is paintable, the finished theatre can match the wall colour exactly – the speakers announce themselves only when the soundtrack starts.