I always tell people if they think their speakers don't sound "right" take them outside where there are no boundaries. This is the single best way to hear your speakers as they actually sound and for some, it is shocking. It's not about loud, it's about getting as close as most of us will ever get to a perfect acoustical space. Worth setting up once to hear the difference. It will lack SPL, the system will not play nearly as loud as it does inside unless you have horns or devices meant for narrow dispersion.
The posts about loud sound blasting outdoors are something else entirely, I agree, its rough to play music so everyone in the neighborhood HAS to hear it with you.