How loud is too loud


Hi. Im new to the world of audiophile and am hoping someone can help with a problem only nine months in to spending £3000  on my set up. I've got an audiolab 8200p power amp, audiolab 8300cd and monitor audio silver 8 speakers. After playing some fairly heavy house music at -10db I noticed a distinct lack in sound quality when I played music at a lower volume and now it sounds as if I've lost a whole frequency level. There is not distortion as such, it's just that music sounds quieter and less definition in the top end. I always run my system in before turning up the volume and never push it too hard for too long. Normal listening level is around -30db.
Any suggestions greatly appreciated.
tcapone
tcapone,

If the loss of sound quality is still there at loud levels, you blew a driver. if not, you are suddenly self aware of your ear's limitations.

Tuning speakers with a smile like curve helps them sound better at low volumes. Loudness controls in older preamps / receivers was also a great benefit.

Best,

E
Thanks for all your insight. 

I will carry on with some sound tests and see how I get on. The shop I bought it from have said they will come out and listen to it, so hopefully they can confirm. If not then maybe I really have damaged my ear drums in some way.

To be continued......
Post removed 
Another vote for the over-looked RS sound level meter.
I too use mine seemingly all the time.
Typical listening: 75 dB peaks (95% of all listening)
Rockin': 85 dB peaks (when I'm gettin jiggy with it)
Brief Moments of Euphoria: 95 dB peaks (very rare)