The CDS6 S3 is a dedicated surround speaker and is an in-wall version of the on-wall DS6 S3.

Surround speakers generally fall into two main types – those that one might describe as 'normal' speakers - so-called monopoles, where the sound comes from a set of drive units mounted on the front of the enclosure - and those that give a more diffuse sound field, such as dipoles. Each type has its advantages.

Most multi-channel music is recorded with home entertainment in mind and is monitored using two, three or four monopole surround speakers. This enables good location of side and rear images.

Conversely, most films are originally balanced for cinemas, where a large number of speakers spread around the auditorium are used to create the surround sound field. With more surround speakers than discrete channels of information, a less precise image is created that gives an all-enveloping effect. Dipoles, rather than monopoles are better at recreating this type of sound field in the home, while using fewer speakers to do it. Dipoles do not image as precisely as monopoles, but they make it easier to balance the whole system for a larger listening area.

The CDS6 S3 offers a choice of both monopole and dipole operation, so you may choose whichever type of operation best suits the conditions of the listening room, the size of audience and the type of programme being played. Indeed, you may use different modes for side and rear speakers, or change the characteristic for different types of programme.