Originally Posted by eXa
So what are your room dimensions?
roughly 17 x 14 x 7
Originally Posted by Martycool007
Somewhat easy fix. Try building some absorbing panels to treat the front & rear walls, as well as the side walls, and if you really want to improve things, and if your wife will allow it, look into adding some absorbing panels on the ceiling, and bass traps in the corners. I am sure that this would make a huge difference to improve your sound quality!
Optimal specs of these absorbing panels would be:
OC-703 rigid fiberglass insulation.
Stack the 2" think sheets on top of each other for a total of 4" thick. Space them off the wall approx 4". You could build 2' by 4' size panels, treating the first reflection points on each wall, and ceiling. The front and rear walls could probably stand to be treated more so than the side walls, but I would use at least two 2' by 4' panels on each side wall. You can search for ideas on how to construct your bass traps, and a suitable material to cover your absorbing panels to make them look nice.
I would venture to say that if you do those things that I mentioned, your sound quality and frequency response would improve by quite a large amount!
I've played with my room hundreds of times with placing pink insulation everywhere...I mean everywhere.
I've tried bass traps, insulating the sides only, the sides and back, and many more combo's. I've always had that 150 dip! It's driven me crazy.
I really thought it was my speakers but am seeing the same thing with the Fusions except better/flatter response.
I don't know what else to do for that 150 dipstick!
Originally Posted by Bill Fitzmaurice
Those distances don't explain a 150Hz dip. Try moving the mic to see what happens, including up and down. And what is the distance from the baffle of the main speaker(s) to the wall behind it/them? Allison Effect is the most common source of midbass dips, yet the most overlooked.
The distance between the baffle of the speaker to the wall range I have is from 8" to 30".
I've tried against the wall to it furthest point (about 30") and that dip is always there!
Here's the results of placing the mic 2 ft forward of MLP (Red)
Pics of the front and back of my room.
Sorry about the mess...still finishing up my Fusion builds
In this picture, the fusions are pretty much against the front wall and approx 20" from the side walls...at that position, they give me the flattest response
The colums are aLL pink insulation filled. you can also see pink insulation up against the side walls in the corners.