The Bowers & Wilkins CCM663SR is a ceiling-mounted stereo in-ceiling speaker that delivers high-quality sound from a single, nearly invisible installation unit. This model features two tweeters in one enclosure and is ideal for smaller spaces where stereo sound from a single speaker is desired, such as bathrooms or compact rooms. With a frequency range of 48 Hz to 30 kHz and a power handling of 80 W, it offers clear, balanced sound reproduction. The speaker integrates a 2.54 cm Nautilus aluminum dome tweeter and a 15.24 cm blue Kevlar cone bass/midrange driver, delivering the signature Bowers & Wilkins sound with high precision and minimal distortion. The design emphasizes discreet integration with a sleek 4 mm thick magnetic grille cover that can be painted to match ceiling colors. Installation is simplified by a quick-dog frame system and spring-loaded cable connections, requiring no additional tools. The speaker has an overall diameter of 240 mm including the grille, requires a ceiling cutout of 202 mm, and has a mounting depth of 133 mm. Built for durability, it is suitable for use in humid environments such as bathrooms, showers, and swimming pools. The package includes a magnetic speaker cover, a paint mask, and a template for the ceiling cutout. This successor model to earlier generations offers improved integration features while maintaining the brand's promise of audiophile excellence from over 50 years of acoustic development.