I'm a firm believer that after a 100 hours or so you really need to crank them up for a few hours.
I had a WP8's for over a year then I had a party. I had the volume cranked to hearing damaging levels. (the party was out side and I left the back screen door open so we could hear out side.) So outside the music was clear.
I had SS equipment and work from home so I had the system on for 8+ hours a day.
The next day I sat down for some critical listening and the bass was much more present.
I had a WP8's for over a year then I had a party. I had the volume cranked to hearing damaging levels. (the party was out side and I left the back screen door open so we could hear out side.) So outside the music was clear.
I had SS equipment and work from home so I had the system on for 8+ hours a day.
The next day I sat down for some critical listening and the bass was much more present.