We have a practice room of about 50m2 with the ceiling height at about 4m. Previously, we had quite a lot of carpets on the floors, on the walls etc., with all kinds of DIY-low budget soundproofing and basstraps. The only thing that was left untouched was the ceiling. In comes the EQ Acoustics tiles...
For our space of about 50m2, we got 3 packs (3x8=24) of tiles and 3 tubes of glue. So combined area covered by the tiles would be something around 14m2.
We used the t.akustik adhesive to fix the tiles to the ceiling. Mounting was rather easy. First, some measuring and marking with a pencil. Then, setting the tiles to the ceiling. It took only a minute or so for the tile to secure against the ceiling (painted concrete) with two of us holding the tile in place. When the job was done, it was time to do some testing.
We turned our amps and PA somewhat louder than usual to really test how much of a difference those 24 tiles above our heads would do, and instantly the difference was very obvious. The definition between instruments and especially vocals was much better. As our band plays heavy metal (vocals, 2 guitars, bass, drums), things tend to get loud, especially with drums. With the improved definition, the vocalist was much happier as he could hear himself much better even when overall volume was louder than usual. The bottom line was: "why did we not install the acoustic tiles to the ceiling years ago?!"
All in all, definitely worth the money. The space did not go "dead" but the overall sound became much more defined and pleasing even on high volume.