welcome guys! ht, ur sales rocketing up nicely ...

Have completed 4 acoustic panels - 2'x4'x3" using rockwool and wrapped in PU foam in plywood frame

Is it in HDTV format (16:9)? Colour (matt white / HC Grey)? Price? This is Aussie brand, right?

I only have Draper and EZscreen. Maybe we can work out something 

yes, i diy'ed the 4 panels myself using 1"x2"x8' timber, 1/8" plywood backing the frame, just nail up the frame with the plywood back.

fill up the frame with rockwool up to 3" thick - i made two 3" thick panels and two 2" thick panels

btw, rockwool is cool


then wrap up the whole panel with 5mm PU foam using stapler gun.


final result


approx cost per panel is RM80 each. timber from timber yard wherever you can find them, rockwool and foam from aircon installer

I'm using these panels for first reflections.

next project is to make bass traps for the 4 corners. then tackle front wall and ceiling.

Yours is cheaper than me , the different is my rockwool is above the frame then wrapped with fabric . also back is hollow and doesnt cover with plywood.

yes, i'm also looking to make diffusor, looked at some plans but have to see what i can get from timber shop, also i cannot make too big coz back wall got window. thinking of installing some curved plywood strips to diffuse sound.

btw, have you got bass traps too? mind to share your plan. do you also install on ceiling? how?

Guys, make sure the back is hollow. And float your panel from the wall with at least 2" gap. The reason for this design is to double the effectiveness of your panel. The sound will travel pass the panel in first pass, reflect back by the wall (reduce sound wave) and go through the panel for 2nd pass. I found a lot of reference from internet. Will take the picture of my panel if anyone is interested on how to float the panel. I just screw in 4 x 2" aluminium tube with rubber feet at 4 corners and hang it on the wall like picture frame. This will allow you to arrange the panel in the most flexible way. If you feel it is over absorb, just shift or reduce the panel to experiment.

Bass trap at 4 corner is a must. The bass is control and deep.

Diffusor actually can get it quite cheap from hiwaylaser. Around RM 150 per piece.
http://www.hiwaylaser.com/diffuser

can have some close-up of the front wall in operation? I'd like to get some idea's if possible. I'm still llooking for the speaker cloth. Didn't you treat your ceiling and wall/ceiling edges?

nice set up pierreye,i like the back panel of ur screen paint in black.If can paint both side walls to some darker colour lagi best(not black,maybe dark green) 

btw,u hide the front spekaer at the back oso? The room acoustic and treatment also nicely done,like the absortber too.I remembered last time in Hi Fi audio room the 1st absortber on both side wall we used to place about 5-6 fts from the front spk.We also place some "triangle pillow" in the front wall/ceiling corner.However,that depends on room size,spk placement and type of spk used.Aslo,the corner of back wall with some treatment like urs also nice.What about the middle of the back wall? Do u place an absortber there too?

welldone 

I'll take some photo today for "behind the scene" equipment.

As for the panel, you need the triangle wood at the corner to hold the frame and the panel. Just screw the aluminium tube and rubber feet on the triangle. For hanging it's simple. Just screw a nail in the wall, and hang it like a picture frame.

Actually the back of the screen is not painted black. The whole panel at the back of the screen is frame wrap with speaker cloth (so that I can see my equipment in the dark and also accoustically transparent for speaker). My screen is 114" brilliant white Carada fixed screen. I previously use motorized screen for my old HT room and wrinkle is the major problem So I advise all of you to go for fixed screen if possible.

I'm thinking of getting diffusor for the back wall either using hanging bookshelf method or just buy from hiwaylaser. Reason I didn't paint the front side wall black is it looks ugly. Anyway, from my experience as long as you have thick enough black border, it's fine. Also, remember to use matte paint for your wall. Don't use Pearl Glo paint. You need to sit at least 5 ft from the diffusor for it to be effective.

As for the height, the screen is 3 ft from the floor as I need to place my center speaker below the screen. So far, no problem watching movie on the first row of the sofa. Second row sofa is perfect. I'm thinking to change the first row sofa to a 3 seats recliner chair with arm rest + cup holder.

You can get semi rigid fiberglass from www.polyglass.com.my. Those that you get from aircon installer is too soft and density might not be ideal.

My advice is room treatment is important. My previous HT room is not treated and only with thick curtain on both side to absorb the sound reflection. I can only watch movie at maximum 85db. In the new theater room, 95db is still comfortable and everything is under control.

Update on automation:
If you see the picture of my switch, there is 3 blue lighted button switch. That's a Senzo switch (developed by local company, http://www.newict.com/) which accept IR, RF and programmable switch. I use Logitech harmony one to do the macro programming as follow:

Enter Theater activity: Light and Aircon switch on.
Watch Movie: Light turn off, projector/receiver/sub turn on. If I pressed pause button, the light will turn on. Press play, light will turn off.

I love Harmony Remote but take me one whole day to get the programming right.

You don't screw the rubber feet to the wall. The rubber feet is just pushing your panel 2" from the wall. You only screw a nail into your wall and hang your panel. Just pull a wire across your panel around 1/4 measure from the top of your panel height. I'll take some picture tonight.

aluminium tube is hollow and the nail is inserted with it where rubber feet is a anti vibrating material between wall and panel. am i right. How u fit the hollow tube to the triangle wood?

pierreye, very tidy and clean set-up. unfortunately i don't have the space for this but am working out something for my front wall-hope it turns out well.

btw, how is your bass trap fixed?

I am thinking of doing it the simple way like this.
[attachmentid=583562]

just hang the panel in the corners.

covering 60% of a room seems too much and may make the room sound dead.

most "experts"  recommend that the key is at least covering major spots in a room- 4 corners, 2 sidewalls and ceiling for first reflections, the tri-corner areas, diffusor for back wall;  i.e. like the diagram in earlier post.

many also recommend to have a "live" floor ( hard floor) so that some reflections can still occur.

http://www.realtraps.com/placing_mt.htm

wats the diff between diffusers and basstraps??

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Added on September 7, 2008, 10:50 pmhmm how will thick 3 layer rippled curtains around the room do for sound treatment?

wats the diff between diffusers and basstraps??

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Added on September 7, 2008, 10:50 pmhmm how will thick 3 layer rippled curtains around the room do for sound treatment?

It cant absorb low bass and bass will rebound. So bass will not deep.

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Added on September 7, 2008, 11:43 pm
bass trap---to trap the bass and avoid rebound
diffusor----to reflect incoming sound to many different direction ----to minimize echo

HT leg

my HD65 just clocked "80" jam

amazing...