Dear @syntax : With the same recording each room/system has its " perfect " SPL to listen it where it does not matters that you put the SPL higher you can't listen more detail.
All room/systems has a threshold about that can be as wider as the quality levels of each one room/system.
Now, in any room/system we can make that threshold wider about SPL if we puts at minimum all kind of distortions/noises developed through the room/system.
But yes you can achieve more details with higher SPLs if you are out of that threshold stratting range. In the other side if you are out of the threhold to range not even you will have more details but the other way around.
Regards and enjoy the MUSIC NOT DISTORTIONS,
R.