Is 120kg/m3 too dense for bass traps?

[djanogil]

I'm about to start building my bass traps,
I'm thinking of using Rockwool panels 100mm thick (3.93 inches),
with a density of 120 kilos per cubic meter.
I think that's more than the usual panel discussed on this forum,
is that a good thing?

[djanogil]

No, really you have no idea?...

[Yiannis]

Density is less important as the rockwool/fiberglass gets thicker.

It has to do with where are you going to use your panels.

Flat on the wall,in corners?

For 10 cm panels you will be just fine but for thicker traps you could use less density material.

Just keep in mind not to use these panels at 1st refections points because you will get refections back due to the high density.

[Cojo]

Mine is around that density and they work just fine. The downside is that they get a little heavy.... but the usual 96kg/m3 also gets heavy. In performance they work similar I suppose.

[Yiannis]

for 10cm panels I have use 75kg/m3
For 20cm panels and SC 50kg/m3

That means less money with the same results

[djanogil]

Originally Posted by Yiannis

Density is less important as the rockwool/fiberglass gets thicker.

It has to do with where are you going to use your panels.

Flat on the wall,in corners?

For 10 cm panels you will be just fine but for thicker traps you could use less density material.

Just keep in mind not to use these panels at 1st refections points because you will get refections back due to the high density.

I'll be using them behind the speakers and in corners.
Actually they are very expensive so I'll get something with less density, I found a product from Eurocoustic called "Protisol", it's a mineral wool panel at 70kg/m3.

Thanks for the 1st reflection point advice..

[Yiannis]

you are welcome.

for the wall panels try to space them from the wall equal to the panel thickness.

5cm panel = 5 cm space, 10cm panel = 10 cm space e.t.c

if you fill the air gap you will get something more but no much for the price.

also for the corners try superchunks if you can.

Good luck

[djanogil]

Originally Posted by Yiannis

you are welcome.

for the wall panels try to space them from the wall equal to the panel thickness.

5cm panel = 5 cm space, 10cm panel = 10 cm space e.t.c

if you fill the air gap you will get something more but no much for the price.

also for the corners try superchunks if you can.

Good luck

I have a wall of windows behind my speakers which I think is the main source of problems, see picture, that's where the panels are going, but I 'm not sure whether I should cover the whole wall or just the area behind the speakers..
Also one of my rear wall corners is where the door is, that means I need bass traps on stands..

[Eric Desart]

Originally Posted by djanogil

I'll be using them behind the speakers and in corners.
Actually they are very expensive so I'll get something with less density, I found a product from Eurocoustic called "Protisol", it's a mineral wool panel at 70kg/m3.

Thanks for the 1st reflection point advice..

Eurocoustic is a very good brand and has boards and wall panels with nice finishes as well.
Some of these finishing fabrics are that strong that these panels are used in sport halls (ball and impact resistant).
It belongs to the Saint Gobain group (as does Isover and Ecophon and glass brands) having over 1000 companies/establishments worldwide.

[djanogil]

Originally Posted by Eric Desart

Eurocoustic is a very good brand and has boards and wall panels with nice finishes as well.
Some of these finishing fabrics are that strong that these panels are used in sport halls (ball and impact resistant).
It belongs to the Saint Gobain group (as does Isover and Ecophon and glass brands) having over 1000 companies/establishments worldwide.

I ended up buying Rockwool panels in 100mm thick, but I'm a bit worried as it is not as dense as what I used before, it's quite soft, and the salesman couldn't find the density, I hope it will work fine, but it won't be as tight as the ones I made before with the more rigid panels..

Eric tu es Francais? Si tu es basé en Ile de France, je pourrais avoir besoin de tes services.

[andrebrito]

that's way too dense for bass traps, you are using rockwool that is used in insulation walls. I'm sure they have some absortion data, please have a look a it

[djanogil]

Originally Posted by andrebrito

that's way too dense for bass traps, you are using rockwool that is used in insulation walls. I'm sure they have some absortion data, please have a look a it

Did you see the previous post I made?
I didn't buy the 120kg/m3, panel, I got a softer one, though I don't know the exact density, maybe 60kg/m3..

[djanogil]

I ended up swapping the panels for more rigid 70kg/m3 ones.
I bought 12 panels , and will start building tomorrow.

I'll make 6 X 4"panels , but haven't decided yet where to place them,
as I said in another post, I have this wall of windows behind the speakers, and was thinking of having all my six panels put together as wall in front of the windows behind the speaker, it would be 240 cm wide and 180 which will go beyond the edges of console/speaker area, but it will leave the very top of the windows uncovered,
which is 40cm( 15" ).
Is that a problem?

Second solution is to use three panels only in that space;

-One behind each speaker and one between them, so I have two left for both front corners.

What do you guys recommend?

[sergioelectro]

Originally Posted by djanogil

I ended up swapping the panels for more rigid 70kg/m3 ones.
I bought 12 panels , and will start building tomorrow.

I'll make 6 X 4"panels , but haven't decided yet where to place them,
as I said in another post, I have this wall of windows behind the speakers, and was thinking of having all my six panels put together as wall in front of the windows behind the speaker, it would be 240 cm wide and 180 which will go beyond the edges of console/speaker area, but it will leave the very top of the windows uncovered,
which is 40cm( 15" ).
Is that a problem?

Second solution is to use three panels only in that space;

-One behind each speaker and one between them, so I have two left for both front corners.

What do you guys recommend?

DJanogil,


So you ended up with Rockwools panels ?
Could you tell me the reference name (in french) of the Rockwool model you chose for your room ?

Thanks

Serge

[djanogil]

Originally Posted by sergioelectro

DJanogil,


So you ended up with Rockwools panels ?
Could you tell me the reference name (in french) of the Rockwool model you chose for your room ?

Thanks

Serge

Hi Serge,

I got two types, I think they were called "rockmur" and "rockfeu".
There was a softer one that I used for a "superchunk bass trap", but can't remember which is which.


Good luck

Jean

[sergioelectro]

Originally Posted by djanogil

Hi Serge,

I got two types, I think they were called "rockmur" and "rockfeu".
There was a softer one that I used for a "superchunk bass trap", but can't remember which is which.


Good luck

Jean

Hello Jean

Yes Rockfeu seems to be the right one !!
Are you happy with it ?

Thanks for your help

Regards

Serge

[djanogil]

Originally Posted by sergioelectro

Hello Jean

Yes Rockfeu seems to be the right one !!
Are you happy with it ?

Thanks for your help

Regards

Serge

Yes it's great, quite rigid so it holds nicely in the frame, it's not mushy, easy to put up in the frame.
in terms of performance, I guess it's good as it is rather dense.
Ideally I'd need more panels in my room, but it's already made a good improvement.
Quite a lot of work though..

Good luck!