CYA...

Bring this to the immediate attention of the builder. Noting that if there is a problem, it's going to be his problem.

Might not be a problem, but then again, it might. Where will the speakers go? If they are anywhere close to that, they may well pick up some noise that you cannot get rid of.

NOW is the time to take any corrective actions.


Personally, I wouldn't want any part of the mess there.