DIY QRD diffuser - pictures
Old 7th February 2013
Gear nut

Thread Starter
DIY QRD diffuser - pictures

Hi I have some pictures of QRD diffuser I build using 8mm OSB board - very cheap

It's double Q11 diffuser
Dimensions 1000 mm x 1220 mm x 170 mm

Weight about 30 kilos

Material cost (including cutting at local wood supplier) ~ 30 Euro

Making time about 8 hours - one diffuser

and finally... two diffusers ready to work in my studio heh

Old 7th February 2013
Lives for gear

Old 7th February 2013
Gear nut

Thread Starter
This is a beta version of diffuser
I wanted to know if I'am able to build it myself.
After some rehearsal of the sound reflected from this diffuser vs plain wall..
There's no way back... I will make more of them.
I would like to cover entire wall behind my mixing position.

So my question is:
How to calculate best QRD design frequency for my room.
Should design frequency be connected with my room dimension modes?
Or is it ok to improvise here with the design?


Old 4th April 2013
Gear Maniac
sl4zhz's Avatar
wow great diffuser.. post more pictures dude..
Old 4th April 2013
Gear Guru
Glenn Kuras's Avatar

One thing you where smart to do was to not put the last frame piece on until the end. When cutting by hand it is almost impossible to cut all the pieces 100% correct and have them fit without gaps. Gaps are a bad thing. When we build ours we use a C&C to cut all wood and grooves for it to fit. Basically good job for building by hand.
Old 2nd December 2013
Gear nut

Thread Starter
After the beta Diffuser made of cheap board I decided to go with the plywood.
I made 6 diffusers.
As Glenn suggested I found C&C company which milled the grooves for wells and fins in top and bottom pieces.

Here's how they look:

and during the work
Old 2nd December 2013
Lives for gear

Pure awesome!

What's that on the guitar cabs ? Looks like bamboo blinds or something ?
Old 2nd December 2013
Gear nut

Thread Starter
Right it's babboo blind. These are 15" bass cabs.
Metal grill did't suit to reggae style
Old 2nd December 2013
Gear nut

Thread Starter
Also one great tip..
Don't ever buy chandeliers like these for the studio....
If you accidentally put your mic under it you will screw up the recoding..
I learned it during some vocal recording session
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