Crank it up just once

Do you care about your hearing? If so, don't listen at just decibel levels. You don't want tinnitus for the rest of your life, believe me.

The rule of thumb is that if your volume knob goes to 10, never go past 9. If it goes to 11...you ROCK!

I did.
Back long ago.... once my upstairs neighbor thought it was a truck that slammed into the building!
I used to play 'Barber of Seville's "Figaro" for the folks two blocks away, with all the windows open on a summer evening.. while I plugged my ears!!! Loved it!
No more though. I have grown up.

Afraid of frying something??

Come on! While I don't routinely crank my system to the 100dB level, it sees it enough.

Elizabeth, like the Barber of Seville, when I lived in St Louis we used to play our own music for the fireworks @ the arch every night, scarily people in our building started giving us requests... You could hear that stereo from the 17th floor blocks away....

Go for it but be careful!

You will hear much more detail when you play louder as the dynamic range expands above the noise floor of your listening environment.

Volume control setting is meaningless, as the volume dial is all relative - some music will blow speakers at the same setting that sounds ok with other music - so watch out for loud passages. Get a ratshack meter to gauge true SPL levels but you should trust your ears...distortion sounds like increased loudness and most systems distort badly long before they exceed what your ears can comfortably handle in clean sound (which is why most people play music at modest levels when the distortion is lower and the sound is comfortable). Distortion at high listening levels is what most often blows speakers.