For problematic rooms like mine ( highly reverberant) commercial tube traps work extremely well. I doubt that any other treatment would work as well. The traps need to go from floor to ceiling, and all of the corners and first reflection points need to be treated. Also, any extended reflective surfaces.
Its not a sightly solution, but highly effective.
One problem with many tube traps in a room is that they will eventually tip the frequency balance, typically leaning out the midrange.
Its not a sightly solution, but highly effective.
One problem with many tube traps in a room is that they will eventually tip the frequency balance, typically leaning out the midrange.