In wall speakers pale in comparison to free standing speakers for many reasons.
Wall speakers vs floor standing.
Free standing speakers tend to sound the best because you have the greatest flexibility when it comes to positioning.
I have a pair of monitor rs8 floor standing speakers and shifting to small flat.
If you do not have space for floorstanders then sell them and buy some standmounts that can be mounted to the wall i e.
Floor standing speakers typically cost more than an in wall speaker.
Many audiophiles who love music that is small in scale like a jazz quartet love great bookshelf speakers.
Good in walls are especially well suited for use as surround speakers.
With in wall speakers you are forced to have an axis that is perpendicular to the front wall if they are installed in the walls and that would prevent any adjustment of seating location and speaker placement after the fact.
Buy speakers that are designed to do what you want to do.
The 1 issue is perception of soundstage.
With all that being said it really boils down to personal preference.
If speakers flanking the seating area of a theater can be moved off the floor and into the walls the possibility of a wine induced mishap is greatly reduced.
If you prefer a floor standing speaker you will want your budget to allow the cost difference.
From a decor standpoint though a bookshelf on a stand does tend to look like its taking up less of the space in a room than a floor standing speaker with a similar footprint.
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There are conventional box shape speakers that are floor standing or bookshelf in size.
There are speakers that mount inside the wall on the wall.
There are even speakers that you can plaster and paint over.
On wall usually means less time spent fine tuning the speaker positions and less chance to make the small incremental changes you can achieve with floor standing cabinets.