There are plenty of 'almost' invisible systems about, but Stealth Acoustics has produced a range of flat panel speakers which cover all ranges and can all be flush-fitted into a wall. Admittedly, all this technology costs. Not only for the product, but also for the installation, which could cost about £80 per hole in a stud wall and £150 for solid brick. Multiply this by the number of speakers to get a rough idea.



Link: Techradar