John Sayers' Recording Studio Design Forum Archive

I have started to work on my new control room. The room have this dimentions: 6 meter (18 ft.) X 5 meter (15 ft.) x 2.6 meter (7.8 ft).
As you see, the ceiling high is too low. I will treat the ceeling with 2" Rockwool, and it is timberlogs every 3 ft. in the ceiling. The Rockwool will be installed between them.

I only use nearfield monitoring (Genelec 1031 and NS-10)

I will install variable Helmholtz, 3 ft. high from floor, on the sides.

Bass traps on the rear corners, and membran absorbers on the rear wall.

Whats the ideal RT60 in a control room with this dimentions ??

Thanks

Finstad

Hi Finstad - the aim in treating a control room is to lower the reverb time of the room evenly over the whole frequency range. If you covered the whole room with heavy insulation you'd end up with the verb time of zero at 4khz yet still at 1.2 at 300hz. So you must balace the top end absorption with the low end absorption.

If you treat your whole ceiling in rockwool between the timberlogs you are going to drop the top end verb time considerably. Therefore the rest of your treatment should be directed at the low end.
Hope this helps.

cheers
john

Thanks a lot John !!
But how about my corner low end absorber, the vari. helmholtz and the membran absorber ??

I think I will tune my room to a RT60 = 0,4 sek.

But how about my corner low end absorber, the vari. helmholtz and the membran absorber ??

The slots on the side walls is fine as is the corner traps. I wouldn't put a membrane absorber on the rear wall as I think it's preferable to have a very dead rear wall.

cheers
john