Respect.
Sometimes you just feel like cranking your music but respect others in the house may not be sharing your need for audio power.
DistinctAV can install wireless headphone stations around larger homes that are connected to the house audio systems.
This way you can turn down the room speakers and turn up one or more headphone sets.
Bring a set of headphones from another room and simple press the channel button to link them to the current room audio.