Not a bad video explaining Room Acoustics and how to treat it, it's meant for the audiophile :
https://www.youtube.com/watch?v=cTnituQu8ig
You can find his website here : http://www.acousticsinsider.com/
https://www.youtube.com/watch?v=cTnituQu8ig
You can find his website here : http://www.acousticsinsider.com/