Originally Posted by King_David
How do you do that?
Setup RS meter in your listening position at ear height(I use a tripod), turn on AVR test tone.
Turn up volume on AVR until your meter is reading 70 or 80 db (depending on which you choose you want to be at 0 on the meter as it more acurate). Then step through each speaker including sub changing line level db up or down until each speaker is at the test tone db level you are using.
Start with sub gain being at 9:00 or 10:00 oclock. In the end I try to achieve speaker balance with the sub line level being at about -5db so you may have to lower or raise the sub gain to achieve this.
Now you are ready to plot your bass room responsiveness. I use the poor man simple man approach. Radio Shack analog SPL meter, Excel with Radio Shack compensation built in and the HSU frequency CD.
There are much more sophisticated approachs like REW, SMS-1 and others.
Radio Shack Compensation spread sheets are on the AVS forum under the subwoofer forum.
If you can not find one let me know in PM and I will send you mine.
By no means the most accurate approach but good enough for me.
I may go to REW sometime in the future but with 4 months of doing this I am very happy with the results so far.