Is louder better?

«Details are in the silence before the explosion»-Anonymus Smith


For sure the volume must be set optimally, between loud and too quiet, music live between the threshold of hearing and listening....

I find louder better as long as I stay below 90db. 

Still, the louder you go the more distortion you get, so..

Yes - until the wife comes downstairs and gives you the stink eye as she walks by.

There are not but you hear the high treble and the low bass frequencies better at certain volumes because that is how the ear works.