The disappearing in-wall models feature Definitive's most advanced technologies such as Balanced Dual Surround System (BDSS) mid/woofer drivers and pivoting Pure Aluminum dome tweeters for spectacular audio performance far beyond traditional flush-mount speakers. Definitive's exclusive Balanced Dual Surround System (BDSS) driver technology permits these flush mount speakers to deliver more bass output and dynamic range than larger drivers. For example, the DI 8R's 8" driver has the output, bass and dynamics of a 10" traditional speaker.
With in-ceiling speakers, listeners are almost always "off-axis". You rarely sit right under an in-ceiling speaker; usually the speaker is at a 30, 45 or even 60-degree angle to the listener. Definitive has engineered DI series speakers to disperse sound over a very wide area so that the sound is well-balance and natural regardless of where you are relative to the speakers. BDSS technology drivers, amiable tweeters as well as the specially contoured and textured AeroRing around the driver all contribute to the wide angle dispersion and superior coverage capability of the DI series models.