I would not spend more money on more equipment: +1.
Have you paid attention to cabling, vibration control of components,
subs and speakers?
Absolutely, room acoustics are likely involved.
What happens when you move your speakers more towards
the rear wall? Moving your seating position forward can
"take out some of the room," reducing the influence of
the room on what you hear.
Do you have a lot of rugs, big sofas, other speakers in
the room? Try "less is more" approach.
Reread "Get Better Sound" by Jim Smith?
Have you paid attention to cabling, vibration control of components,
subs and speakers?
Absolutely, room acoustics are likely involved.
What happens when you move your speakers more towards
the rear wall? Moving your seating position forward can
"take out some of the room," reducing the influence of
the room on what you hear.
Do you have a lot of rugs, big sofas, other speakers in
the room? Try "less is more" approach.
Reread "Get Better Sound" by Jim Smith?