John Sayers' Recording Studio Design Forum

Hi to all! After lots off reading this forum and lots off planing
i started to work on my room..

The biggest problem is that this room has square dimensions:
360 x 360 x 260 cm (11.8 x 11.8 x 8.5 Feet) so i had huge bass
problems.

I decided to built big bas traps in corners, broadband absorbers on
side walls, cloud above mix position and QRD diffusers on back wall.

For now I built two bass traps in front corners but i am afraid i used
too soft rock-wool.. its tervol dp3 10 cm (4 inch) deep (i am very limited with rock-wool products here where i live). I cut them diagonally and placed
them on top off each other and then made 120 x 80 cm frames, covered
them with microfiber fabric and placed them in corners like on pictures.

For my broadband absorbers i used 120 x 60 x 5 cm frames and put two tervol TP which is a rigid rockwool used for floors and placed them on first reflection zone on side walls.

questions:

1. should i use tervol tp for my third bass trap on back wall or i can stay
with DP3
2. what else am i missing something.

Overly room sounds much better now and i believe whan i build everything planed it should be ok. I am buying KRK VXT 8 soon so
I very interested how they will sound here.

please, i would really appreciate some feedback,
am i doing it right and should i do something different..

i know i need lots off bass trapping and
i am afraid that these corner bass traps
are not that efficient...

also is microfiber good for this?

on the picture you can see bass response
before treatments...

sorry for my bad english.
best regards
tomislav

I just made few measurements and moved speakers around.
This is the best i could get.

so, i have redesigned my table... removed the metal legs
and made new wooden 2" fat (i cant remember the right word:),

and i put some cement blocks which have hole in the middle,
they weight at least 15 kg. Now my cat have new hiding place

Hi Tomislav. I just wanted to comment that those bass traps look really good to me! I'm thinking of doing something like that in my studio.


And your frequency response curves look fairly decent to me, although I'm no expert on that. I guess the roll-off below 80 Hz is due to the limitations of your speakers, rather than then room itself.

Maybe one of the acoustic experts will comment on your questions, but from the size of those bass traps and your comment that the room sounds good now, I think you did just fine. I don't think that "soft" rock wool is going to be a problem, by the way: The amount you have in there is pretty large, so my guess is that it is working fine.

Studio Monitor Stands on Wooden Plank Flooring - Decoupling

_________________
Brien Holcombe
_____________________________________________
Sound: You can't stop it, you can only try to contain it.

Its not bad, but its not enough, it still has 20 dB difference on some frequency, but there are more basstraps to be made so i believe i
could get 6 dB whan i am done. I believe it would be even better with
more rigid rockwool, maybe it would give me deeper bas absorption. I will use it on my other basstraps.

Good luck and best regards,
Tomislav

I like the idea but if i move my table back, my listening position will be at
the center off the room which in my square room is the worst place to be.

BTW. I am building one QRD diffuser next week for my back wall.
Will it be effective in my room? My listening position is 9 foot from back
wall.

There are the calculations.

Get a smaller table.

_________________
Brien Holcombe
_____________________________________________
Sound: You can't stop it, you can only try to contain it.

I will consider it. Question is how much more i would
minimize vibrations. I already did pretty good job
by making my table massive and decoupling it from floor,
and with these cement blocks with rockwool under it
and rubber on them.

...but, i will really consider it...

here is the waterfall, what do you think?

I am sorry if i am starting to be annoying,
but i would like to show you my plan for back wall.

Should the diffusors be closer together?

and this is the design for cloud. Each panel is 200 x 60 x 10 cm.
I believe it would be good for my 47 Hz problem and for early reflections.

Am i right? Would all this make my room too dead?

One comment: The door into your room is eating up the space where you need to put another bass trap, in order to keep your room symmetrical. Symmetrical is important. There is another thread here somewhere, from someone else who has the same problem, and came up with the idea of mounting a bass trap on wheels, so he can roll it up against the door when he needs to do any critical listening. You might want to do something similar.

Its a good idea but i am much more concerned about
the whole design. I would really appreciate if some off this forums
experts could give me some feedback. Ethan, could you help?