Thank you , i did some measurements already on some spots with the basstraps i have, and it does help. I just still got a question left concerning the equilateral triangle. I was just wondering how importand it is to stick on this rule when it comes to the width ( speaker to speaker) the thing is that i can get some pretty good results when the width is at a diffrent length. Also just for wanting to know how it works, how much and what does affect the width when talking about an equilateral triangle?. The same distance to the walls and the same distance to the listening postion already covers the speed and the frequentie response i would think.