I don't know of any speaker manufacturers that make something like that. IIRC, it's due to code issues - you have to have UL rated electrical devices enclosed in grounded wallboxes. The problem with ...

Installing in-wall, or flush-mount, speakers in the wall or ceiling of a prewired home is a task easily performed by a homeowner. However, determining the location of the home's prewiring requires ...

KEF America and SpeakerCraft expect to accelerate their sales with motorized in-ceiling speakers that combine sonic advantages with a little flash. When active, the flush-mount speakers extend outward ...