can you explain that part a little better?
I can try.
Due to its dimensions, every room will have certain frequencies that resonate in it, those frequencies will be detectable because they will be louder than the other frequencies; if you played a 50Hz and a 70Hz tone in a room that had a resonance at 70Hz, the 70Hz tone would be louder because of the room. These resonances also tend to "ring" which further decreases sound quality.
What that means in practicality is things sound boomie, it sounds bad because the tonal balance is messed up, some frequencies are louder and last longer than they should, bass ends up sounding "slow" "boomie" "thick" until the problem is addressed.
i downloaded some test tones from hear
http://www.realmofexcursion.com/ but i dont know what to look for when i play them
.
What you are looking for is the frequency that is the loudest, all of those tones are recorded at the same level, so any change in volume in playback is because of the room.
Once you know what frequency is causing the problem, you can experiment with subwoofer placement to try to lessen or remove the problem. You may only need to move the subwoofer less than a foot to see a result.
I hate to be the barer of bad news, but it doesn't look like those tones will deliver the resolution needed to find resonances.
and what test tones can i use for my fronts and surrounds? i woud need somthing for higher FQ right? sorry for all the questions.
Don't worry about the questions, we all started somewhere!
I wouldn't be concerned about anything but the subwoofer. And in that regard, Audioholics had an
artical on subwoofer placement that could be of some help.