> some audio setups will sound better than others in your living room, because of a million variables you can't really control for

Erin over at Erin's Audio Corner did a really nice video[1] recently which focuses on room treatment, but dives into some of these variables which gives a good insight in why something that works well for you might be horrible in my living room.

[1]: https://www.youtube.com/watch?v=VTshtgikT7Q