As I interpert what you are saying when you mention integrating bass and that the sound is flat unless you're right on the back wall is that you are complaining about (a lack of) the fullness of the bass, a sense of warmness. Might that be correct?
Assuming that it is have you been familarized yourself with set up procedures, such as talked about on the Rives site or have you looked up the 'Cardas System' for a good set up starting point (basically he suggests a speaker listening position triangulated, close to equal distance, and with the listening position as well as the speakers about 1/3d into the room. 1/4 might work as well, as a starting point. If you get a sound pressure level meter and a test disc with 1/3d octave pink noise you can measure (and chart) the frequency response of each set up until you get one that is a flat as you can.
This can be a long and tedious problem, very long! But its worth it. Toe in is not a frequency response issue - except proper toe in (including crossing the axis of the speaker in front of you) affects the high-frequency respons some and helps focus your sound stage more sharply.
If you want some specific advise you might describe your actual set up in your room now so folks can better appreciate exactly what recommendations might actually help you. Use exact measurements.
Assuming that it is have you been familarized yourself with set up procedures, such as talked about on the Rives site or have you looked up the 'Cardas System' for a good set up starting point (basically he suggests a speaker listening position triangulated, close to equal distance, and with the listening position as well as the speakers about 1/3d into the room. 1/4 might work as well, as a starting point. If you get a sound pressure level meter and a test disc with 1/3d octave pink noise you can measure (and chart) the frequency response of each set up until you get one that is a flat as you can.
This can be a long and tedious problem, very long! But its worth it. Toe in is not a frequency response issue - except proper toe in (including crossing the axis of the speaker in front of you) affects the high-frequency respons some and helps focus your sound stage more sharply.
If you want some specific advise you might describe your actual set up in your room now so folks can better appreciate exactly what recommendations might actually help you. Use exact measurements.