K bought the rock wool Have some questions regarding phase 2...

[meymia]

I bought 24x 120 60 5 60kg density rockwool and im gonna attach it (only on traps not on 1st refelction point material) to a wooden frame (a thin one not the ones that actually covers the entire side of the rockwool.

Any way i bought enough material only to cover the front and side of the trap and not the back.

1)is it bad?

2)Are the rock wool fibers gonna get out of there and into my lungs?

3) Bottom line drag myself and get some more fabric or can i just leave it the way it is?



*Another thing is the 1st reflection point (its the same rockwool) ,what i was thinking about is just grabbing 1 plate and cover it with fabric and apply it on the wall (two o these on my front to back to on each side)


4)Im not gonna stack 2x5 cm on each other and make a 1st reflection trap cause one is enough for high and mid (which is all we need to absorb in 1st reflection)right?

5)Why do people put rock/glass wool on the front wall (behind the monitors) its not a 1st reflection point....?


6)What is the best way to hang those 1st reflection points rockwool wrapped in fabric traps (no wood there only on bass traps) ?


Thanks.

[Lupo]

Originally Posted by meymia

Any way i bought enough material only to cover the front and side of the trap and not the back.

1)is it bad?

2)Are the rock wool fibers gonna get out of there and into my lungs?

3) Bottom line drag myself and get some more fabric or can i just leave it the way it is?

What sorta plates are these? Raw rockwoool throughout? The ones I buy, "acoustic plates", have a paper facing on one side and a fiberglass facing on the other side. Both are strong enough to retain the fibers without fabric wrapping.

If it's raw rockwool, some sort of covering would probably be nice. A garbage bag could do.. The fibers won't jump around on their own accord - but trust me - someone is bound to touch those panels! Any movement of the panels themselves, or strong air currents, will send some fibers off into the air.

Originally Posted by meymia

4)Im not gonna stack 2x5 cm on each other and make a 1st reflection trap cause one is enough for high and mid (which is all we need to absorb in 1st reflection)right?

Right.. But.. You'll probably want as much absorption as you can get. 10 cm will provide some broadband control too, in addition to sharpening the stereo image.

Originally Posted by meymia

5)Why do people put rock/glass wool on the front wall (behind the monitors) its not a 1st reflection point....?

Modal control?

Originally Posted by meymia

6)What is the best way to hand those 1st reflection points rockwool wrapped in fabric traps (no wood there only on bass traps) ?

I presume you meant to write hang? A broad flat strap, like the ones used for wrapping heavy packages(auto shop stuff), wrapped all the way around the panel, could work well. Reinforce the contact areas with some cardboard if needed to avoid the panel crumbling around the rope.

[alexson115]

Hello everyone. Nice to meet you all.

pret personnel

[meymia]

Hi dude.

[spm_gl]

Originally Posted by meymia

5)Why do people put rock/glass wool on the front wall (behind the monitors) its not a 1st reflection point....?

Of course it is, if the monitors aren't flush-mounted in the wall. Your monitors aren't as directional as you'd imagine. There's a lot of sound going around the back.

[meymia]

1)Come on guys please help me out here i didnt buy enough fabric for covering the back of the trap..should i buy some more or it isnt that bad that the back of the trap will be exposed?

2)Is it recommended to space the 1st reflection point traps from the wall as well or shold i just attach it direclty on the wall?

*How about a frame for the 1st reflection point material? should it have a wooden frame?

3)I keep seeing people making all these wooden frames for there traps AS DEEP AS THE 2X2" material they use...What some one offerd me is to just make a frame and then place the 2x2" ON that frame and that wrap it...what do you think?

[Lupo]

Originally Posted by meymia

1)Come on guys please help me out here i didnt buy enough fabric for covering the back of the trap..should i buy some more or it isnt that bad that the back of the trap will be exposed?

It would help if you could answer the questions previously posted. ;)

Originally Posted by meymia

2)Is it recommended to space the 1st reflection point traps from the wall as well or shold i just attach it direclty on the wall?

Space them!

Originally Posted by meymia

*How about a frame for the 1st reflection point material? should it have a wooden frame?

3)I keep seeing people making all these wooden frames for there traps AS DEEP AS THE 2X2" material they use...What some one offerd me is to just make a frame and then place the 2x2" ON that frame and that wrap it...what do you think?

Less framing gives more absorption.

[meymia]

Originally Posted by Lupo

It would help if you could answer the questions previously posted. ;)

Which one?

Space them!
K i will...meainig i need framing for them too :( more money...


Less framing gives more absorption.

They thing is i got these 2" deep wooden framings...now i can fet one rockwool panel in them and the 2nd on top of it and wrap them up real tight with the fabric so it will hold them real tight together ...How does that sound?

[Lupo]

I'll turn to old school quoting to make the threading easier to read:

>>It would help if you could answer the questions previously posted. ;)
>Which one?

If your panels are raw rockwool everywhere or if there is some sort of facing on the front/rear...?

>>Space them!
>K i will...meainig i need framing for them too :( more money...

Not necessarily. You could simply put something behind them, a piece of cardboard, styrofoam, etc could space them out from the wall. The weight from the panels will keep it in place. If you're worried about the spacers falling off, glue or nail it in place. Or drive a few nails into the wall behind.

>>Less framing gives more absorption.
>They thing is i got these 2" deep wooden framings...now i can fet one rockwool panel in them and the 2nd on top of it and wrap them up real tight with the fabric so it will hold them real tight together ...How does that sound?

Excellent!

[meymia]

Originally Posted by Lupo

If your panels are raw rockwool everywhere or if there is some sort of facing on the front/rear...?

>>Space them!
>K i will...meainig i need framing for them too :( more money...

Not necessarily. You could simply put something behind them, a piece of cardboard, styrofoam, etc could space them out from the wall. The weight from the panels will keep it in place. If you're worried about the spacers falling off, glue or nail it in place. Or drive a few nails into the wall behind.

>>Less framing gives more absorption.
>They thing is i got these 2" deep wooden framings...now i can fet one rockwool panel in them and the 2nd on top of it and wrap them up real tight with the fabric so it will hold them real tight together ...How does that sound?

Excellent!

*My panels are naked both sides meaning only rockwool no extra nothing.
(2" 120x60 rockwool 0.7 average nrc with no space from wall and 0.88 with space)

Im really giving thought to what you said...I DONT NEED WOOD on the contrary it actually steals areas that can absorb.

Now all i need is a method to space it from the wall (the methods you describe apply only if the traps stand on the floor ...i was intending on hanging them (on tri corner on wall to wall meeting and on 1st refection points.

Allso i DO need more fabric cause to back will be open.

*Another idea we had is to place the rockwool ON the frame not IN it
How does that sound?

*I dont know how but i understood that a 1st reflection point material doesnt need to be spaced from the wall or even doubled (2"x2) or wooden framed cause its not suppose to absorb that much of low freq' it supposed to absorb mids and high's...Am i wrong?

[Glenn Kuras]

I got your pm

1)is it bad?

That is fine

2)Are the rock wool fibers gonna get out of there and into my lungs?

Not at all and if it did it would not hurt you in any way

3) Bottom line drag myself and get some more fabric or can i just leave it the way it is?

I would just cover the fronts if that all you have.

4)Im not gonna stack 2x5 cm on each other and make a 1st reflection trap cause one is enough for high and mid (which is all we need to absorb in 1st reflection)right?

Yes that will be fine.

5)Why do people put rock/glass wool on the front wall (behind the monitors) its not a 1st reflection point....?

For the SBIR
Learn what is SBIR (Speaker Boundary Interface Response).

[meymia]

Thanks for your replay dude i value your opinion alot.

Thing is i found a place REALLY cheap for full wood so im gonna make those normal frames after all...PLUS i remeberd my brother in law has a round drill thingy that can cut big holes in the side wood panels so more surface for me yipi!

Oh and i allso decided to make a normal trap for 1st reflection point 2x2" and spaced with wooden frame just like a bass trap.

One question: my rock wool is 5cmx1.20x60cm and of course im using 2 per trap meaning 10 cm deep.
When i buy the wood should i buy wood exactly the same mesurments as the trap or higher deeper wider in any way? im gonna buy it tommorow so a swift replay whould be cool.

Thanks alot!

[Lupo]

Originally Posted by meymia

Now all i need is a method to space it from the wall (the methods you describe apply only if the traps stand on the floor ...i was intending on hanging them (on tri corner on wall to wall meeting and on 1st refection points.

Try it with a painting or anything that have some slack on the rope it's hanging off of. I've done it myself and I promise you that it'll work! If there's some slack in the rope, you can pull the absorber off the wall, place a piece of cardboard or whatever behind and let go of the absorber. It'll be spaced off the wall. :)

For tri corners, space them so they straddle across the corner with the edges of the panels touching the wall.

[meymia]

Originally Posted by Glenn Kuras

I got your pm



That is fine




Not at all and if it did it would not hurt you in any way



I would just cover the fronts if that all you have.








Yes that will be fine.



For the SBIR
Learn what is SBIR (Speaker Boundary Interface Response).

Didnt understand this passage from the article:

"Generally, you're best off if the distance from speaker face to front wall, driver centers to side wall, and driver center to floor are 3 different dimensions in order to not reinforce any specific set of harmonics by having all the boundaries generate the same SBIR effect."

What did you mean by drive?r