This is pretty simple, you are playing too loud. 250 watts sounds like a lot of power but it's not, it's only 3db more than 125 watts. An in-wall speaker is limited by it's design, it's not meant to rock the house down. There is a reason that there are really big floor standing loudspeakers. If you want big sound you'll need big speakers.
The only guide for feeding power is, that if it sounds loud, it's probably distorting and you need to turn it down. A good speaker will play really loud but will not distort, you'll just notice you are shouting to talk over the music.
It sounds like your audio designer didn't quite meet your needs. At 91db efficient (in room/per Energy) you are not going to get where you want with this speaker and your amp.
Most in-wall systems are designed specifically to trade sound quality/volume for aesthetics. You might want to re-think your requirements.
Thanx, Russ If I have it wrong, I apologize.
The only guide for feeding power is, that if it sounds loud, it's probably distorting and you need to turn it down. A good speaker will play really loud but will not distort, you'll just notice you are shouting to talk over the music.
It sounds like your audio designer didn't quite meet your needs. At 91db efficient (in room/per Energy) you are not going to get where you want with this speaker and your amp.
Most in-wall systems are designed specifically to trade sound quality/volume for aesthetics. You might want to re-think your requirements.
Thanx, Russ If I have it wrong, I apologize.