When calibrating my system with the internal test tones of my sherbourn pt-7000 processor for the main 7 speakers I get almost identical trim levels as I would using Avia for the same speakers. However the sub level between Avia and my internal bass test tone on the pt-7000 is way different and I am verry frustrated. Avia is about 5-7 db quiter than the test tone in the processor. Considering all other levels are the same between the two that means one is wrong and one is right as far as bass levels are concerned. I would usually trust Avia but it seems verry strange to me that I have to turn the sub up as loud as I do using avia to get 3db hot. I am using a pb2-ultra in a 12 x 17 fully enclosed room and I need the gain up around 2/5 the way which is not completely wierd, but with the test tones of the processor it is only up about 1/4 of the way on the gain which seems more correct with accordance to my room size. Of couse the bass at the corners of my room is way louder than at the listening position with the test tones according to the meter and moving the sub does not seem to help all that much. I can not move my seating area. Why is there such a difference in bass response between the two tones (Avia vs processor test tone)? I noticed in the avia sub setup menu that the tones are meant for a single sub system, so would the pb2-ultra qualify for this since there is two drivers or would it be considered a dual sub system at this point and avia will not work???? The pb2 ultra manual says you can use Avia so I asume this is not a problem. Which test tone should I trust? The quiet Avia or the louder internal tone of the processor? This is frustrating because If Avia is correct than that means the processor test tone is 5-7db hot automaticaly and if you add the average 2-3 db hot calibration you will really be running the sub 7-10 db hot when you think you are only running about 2-3 db hot. What do you guys think? This can be one frustrating hobby.... My room is 12 x 17 fully enclosed with all the equipment on one end of the room (small sanus equipment rack in one corner, 36" tube tv on stand in middle and jbl s-38 speaks on bar stools on either side of tv. At about the 2/3 way point into the room sits the couch and I have about 4.5 feet of space behind the couch so I can be out from the wall and get good surround effects. I have 4 more s-38 on shelves to the side and rear of the seating area. According to what I have read, 2/3 should be a good response area. What is going on here?