double sided tapes worked for me so far.

Not working for me la bro. All my foam using double sided fall off oredi. Now I just roll them to become bass trap. My place got no echo like urs but just need to tame the bass a bit.

Such great systems and equipments but poor arrangement and rack ...

You need to use 3M double sided tape, those grey color. Super sticky and can stand high temp. Still don't work then use dunlop gum.

My wife will 'smack' me

Anyway 3m is good idea. I always like 3m stuff.

Dunlop gum?! LOL...

I still remember those old days when we use it to repair our own shoes

Dunlop Glue will just eat through the Foams before you are able to mount them on bro ..

It works ...
No problem, i'm sticking a whole pc approx 3ft x 6ft to my AV room door ... with DUNLOP glue !

maybe u guys using different type of Dunlop glue? or maybe Donlop...

I've never tried those glue before thou, but the chemical should eat the foams I guess .. maybe I'm wrong .. hehe .. but dunlop on the walls .. sure permit tak lepas.

I came across a website which suggested to use Velcro strips so that we can adjust the placement of the foams after tests.

But then, how to stick the Velcro strips on the wall leh... same problem

Not to mention the 'foul' odour that it emits. Unless you are a glue sniffer. Yikes!

Bro, any possibility to cut the foam diagonally?

What do you mean by that ?? you mean you want to have them in triangle shape?
I'm working together with my brother on a new project for a recording studio, will have variable types of foams when the project starts.
Will update you on the types, so far how are the performance of the 1st batch of the foams?

Sifu, how do you guys reduce/eliminate the echo sound in your precious HT room? I can hear the high frequency echo sound when clapping my hands at the middle of the room.

I DIY some triangle and rectangle trap using Roxul MPS400 and putting around the 4 corners and still no success to avoid the echo. On the floor, I have put on the carpet. The missing part is on the ceiling. Somehow I got difficulty to put something on the plaster ceiling, first the ceiling cannot withstand heave weight item and second got ceiling fan at the middle

You had the same problem that I had before, I placed acoustic absorbtion foams behind my speakers and behind my sitting position which eliminates the first point sound reflection. I've posted Images of the foams on the previous 3 ~ 4 pages .. If you're interested pm me for more details.

Edited: It's on page 78 (before foams) & page 81 (after foams)

This post has been edited by s6xs9x: May 25 2009, 12:59 PM

Maybe you need more traps. Don't just place at 4 corners, try also putting some in the middle of the wall maybe.

Mind to share with us the size of your room?
Maybe we can figure out and help you with it..

Actually I built a total of 12 traps of various sizes and put on various locations as below.

4 triangle traps (17"x17"x24") at the 4 ceiling corners.
3 rectangle traps (4'x2') at the 3 wall corners (the other corner got door)
1 rectangle & 1 square traps (2'x2') hang on the door
2 rectangle traps at the sides of the front speaker
1 rectangle at the back of the sofa

At front, got 90" projector screen and very difficult to put things. On top, problem to hang thing due to plaster ceiling and fan.

If I clap at my sitting position, cannot hear any echo. Echo can be heard if I clap at the middle of the room.

Will try to snap some photo after work.

This post has been edited by gocitygo: May 25 2009, 01:45 PM

regarding adhesive.......there's this thing from 3M called Command strips...its double sided tape...there's weight rating on the thing...so you can estimate how much of adhesive to use.....best thing is that it is removable from wall without stripping the paint off....surefire can get approval from HM.

To reduce your echo due to clapping test (mid to high frequencies) you need to cover the sidewall corners and ceiling as well. The corners are more for controlling bass.

My HT room setup with my DIY acoustic panels made from rockwool.



This post has been edited by ycs: May 26 2009, 06:08 AM