Go out and land yourself a copy of Dr Floyd Toole's latest book.
In it you'll learn why treating 1st reflection points is NOT a good idea; where your room's transition frequency lies and how the treatment strategy below this frequency differs from the strategy above it; how various bass absorption methods work and which may be best for your room size; why mid/high frequencies should be reflected or diffused rather than absorbed; where diffusion should be placed and whether it should be 1D or 2D kind of diffusion and what available brands/models are which; how thick absorption should be and how far out from the wall the air space behind it should be . . . and many more very important nuggets.
In the end you are listening to direct (from the speakers) and indirect sound (reflections of room boundaries) and ideally you wish to remove the room from the equation, or at least minimize its negative effects on the sound and enjoy its positive effects on the sound. But knowing which parts of the room will harm the sound and which will be beneficial is of untmost importance. Otherwise you'll spend (waste?) much time trying many itterative variations of speaker, listening position placement options.
Dr Toole is not affiliated with any acoustical treatment manufacturers so he calls a spade a spade. He wrote the book after he retired so again he is unbiased and a world renown expert.
(I have never met the man, nor am I related in any way.)
Good luck.
Kevin
In it you'll learn why treating 1st reflection points is NOT a good idea; where your room's transition frequency lies and how the treatment strategy below this frequency differs from the strategy above it; how various bass absorption methods work and which may be best for your room size; why mid/high frequencies should be reflected or diffused rather than absorbed; where diffusion should be placed and whether it should be 1D or 2D kind of diffusion and what available brands/models are which; how thick absorption should be and how far out from the wall the air space behind it should be . . . and many more very important nuggets.
In the end you are listening to direct (from the speakers) and indirect sound (reflections of room boundaries) and ideally you wish to remove the room from the equation, or at least minimize its negative effects on the sound and enjoy its positive effects on the sound. But knowing which parts of the room will harm the sound and which will be beneficial is of untmost importance. Otherwise you'll spend (waste?) much time trying many itterative variations of speaker, listening position placement options.
Dr Toole is not affiliated with any acoustical treatment manufacturers so he calls a spade a spade. He wrote the book after he retired so again he is unbiased and a world renown expert.
(I have never met the man, nor am I related in any way.)
Good luck.
Kevin