Mikseri.net

#2 kirjoitettu 28.08.2012 11:55

yeah, your best bet is prob thomann.

Or then just DIY.

#3 kirjoitettu 28.08.2012 15:20

You didn't mention where you live, but maybe there's a music store somewhere near you - maybe they're selling. Or if not, there's a good chance the staff can help you find someone who does.

#4 kirjoitettu 29.08.2012 07:00

Thank you all for the answers.

I checked F-Musiikki and DLX-Music and they don't have such panels.

So maybe DIY is a good idea. I see that Starkki and K-Rauta have Paroc rockwool slabs - I could not find anywhere that has the Owens Corning 703 fibreglass slabs though - does anyone know a place to buy those in Finland?

#5 kirjoitettu 29.08.2012 22:50

Mosaic kirjoitti:
Thank you all for the answers.

I checked F-Musiikki and DLX-Music and they don't have such panels.

So maybe DIY is a good idea. I see that Starkki and K-Rauta have Paroc rockwool slabs - I could not find anywhere that has the Owens Corning 703 fibreglass slabs though - does anyone know a place to buy those in Finland?


OC is an american company and making mineral wool products is very much a local thing. They are so cheap, that they are not worth transporting from overseas.
DIY is always a good idea. From Paroc, COS-5 is good for thin absorbers of about 100mm and less. If you wish to trap bass, more will be needed. In that case commonly available Paroc eXtra is the better choice. COS-5 is a special order product and you may have to wait for it for a while and pay some additional fees. eXtra on the other hand is commonly in stock, though you should check the available thicknesses. They are not always even hundreds of mm.
Paroc is to my knowledge the only company here, that released any air permeability numbers, the two products mentioned being virtually the only viable options for DIY-acoustics. (eXtra plus being somewhere in between) Others will prob do (Isover / Knauf etc.) but with no numbers it´s more or less a shot in the dark. During the summer I contacted these companies in order to compile the permeability numbers of available products somewhere (maybe on this forum), but received either no answer or a promise to "get back to you". Still waiting. Maybe they don´t measure such things as "nobody" needs them on a product intended for thermal insulation.
I hope your room treatment will be a triumphant success.

#6 kirjoitettu 30.08.2012 11:42

Thank you again for the replies.

I checked the Paroc Extra and even on Paroc's own web site I could not find its density details ...

I have a very small room available - its 2.45 m long by 2.1 m wide .... so I was planning some bass traps (I guess the size of those paroc slabs - there is 125mm thickness or 100mm thickness - perhaps 1 x 125mm is enough, or even 2 x 100mm?) in the 4 corners - then something thinner on the early reflections sides, ceiling, and perhaps one on the back too. Does that sound like a good plan? Maybe the room is anyway too small to be a success ...?

#7 kirjoitettu 30.08.2012 23:35

Mosaic kirjoitti:
Thank you again for the replies.

I checked the Paroc Extra and even on Paroc's own web site I could not find its density details ...

I have a very small room available - its 2.45 m long by 2.1 m wide .... so I was planning some bass traps (I guess the size of those paroc slabs - there is 125mm thickness or 100mm thickness - perhaps 1 x 125mm is enough, or even 2 x 100mm?) in the 4 corners - then something thinner on the early reflections sides, ceiling, and perhaps one on the back too. Does that sound like a good plan? Maybe the room is anyway too small to be a success ...?


Density doesn´t make or break a deal. Air permeability is the number you want to look at for reference. Anyhow eXtra is lightweight and flexible, so it does compress quite a bit if need be.
The room is small but that doesn´t tell much. If the structure is wooden, gypsum or other light stuff, it´s probably not that bad. If it´s concrete, good luck. You´ll need it.
The modes will be affected by the bass trapping.
The early reflections are affected by the side- and ceiling panels.
The Speaker-Boundary Interference Response is affected by... ?

I like to recommend taking measurements for two reasons:
1. You will be able to move speakers and listening position before making any panels. This will also help you to understand what the problems actually are.
2. You will be able to verify the difference the traps have made, and see where the traps have the biggest impact.

Do you have a chance to make measurements? Using Room EQ Wizard and a measurement microphone?
I understand if it seems like too much hassle.

#8 kirjoitettu 02.09.2012 20:58

Thanks meomarte.

I bought some Paroc Extra from Starkki, and enough wood and material for 6 panels ...

I set up REW - a bit confusing at first, and I have only one very cheap mic, its my daughter's so its not at all quality ... I don't know if that affects the readings.

I tested on 2 rooms - the one where my music set up has been - big with a lot of echoesy, no symmetry, in a corner ... and the small room I mention above. The frequency readings actually seemed better in the bigger room, though the waterfalls better in the small room (at least, I THINK they were better - is it the shorter graphs is better ... ?)

The smaller room anyway sounds much tighter - very little echo. Lets see how the panels will help ...

#9 kirjoitettu 03.09.2012 20:03

Ideally the mic would be a small diaphragm condenser with an omni pickup pattern. Or any omni really. But a directional mic, even a cheap one should get you started for comparing different things.
You want the waterfall to resemble the side of a barrel. Again ideally, so that no frequency rings much longer than any other.
If you can reduce the ringing time of some mode, you have done good already, even if the frequency response has not changed much.

Looking forward to results.

Have you checked Gearslutz.com ?
They got some very knowledgeable people there. Just thought I´d mention as this is supposed to be a finnish forum, and I don´t know what the Powers That B think about prolonged english discussions outside the joke of an english area.

#10 kirjoitettu 06.09.2012 10:38

Hi.It's Sandy from Burgeree (web:http://english.burgere...),we have acoustic panel you need,but min oder is 200pieces,Finland is a most environmental country,I think many people need this product,maybe you could contact with them and order together