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bass traps and sound proofing door cheap as possible. need advice.(update:done!)

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RexAeterna:
Yea, just need bit help since I forgot lot of stuff. Anyhoo,  I was thinking just buying some but I think I'll be better off doing it myself so i do have some questions.

Material? I know roxul rock wool is best for money but what type? I was thinking of the safe n' sound stuff. It's 3" thick and comes with 12 slabs that are 2x4 so I was thinking of cutting each slab in half so there will be 24 slabs of 2x2. Plan on taking care of my corners first. That's my first priority since my overall room and listening position is not that bad with high and midrange frequency due to my listening distance, density of my futon and room due to it being drywall so it'll be real easy I assume for absorption on that part. But first corners and front back ceiling.

I plan on buying one bag for now due to cost and since I plan on cutting each slab in half there should be more then enough for each corner(3 for each corner).

Thing is one corner is bit smaller near the floor due to closest door but ceiling is fine. Think of doing the ceiling part only so there be 21 pieces used and 3 left. I was thinking of compansating by 2 behind me on the back ceiling and 1 on the front ceiling so it'll be like triangle format.

Thing too, is how I place them without too much issue and is simple? Was thinking of wrapping the wool in shirts or something and then thumb tack, staple or double adhesive tape maybe. Is that fine? Is it effective? Is the safe n' sound stuff good choice? It being around 45 bucks a bag it can get pricey so, I want make sure I get most out my money and not wasted.

Thing I like to do is soundproof my doors too. The main door and closet door. I was suggested foam board cheapest and effective option. What type, if there such thing? I plan on using double adhesive tape for the foam on the doors. I plan as well to get everything hopefully at a local home depot.

What is your suggestion(s)?

Edit: forgot mention, the room is about 15x15 and ceiling to floor around 12ft.

thune:
If I remember correctly from Floyd Toole talking about these things, it's not so much the stuff itself but that "absorbers should be at least three inches deep". Some day, I'm actually going to read his book.

thune:
I certianly remember using this stuff in the late 90's, it was a thin tarp like material above a 1" fiberglass pillow, encased in a light burlap-y fabric. Seemed like it did more than the theory would suggest. But that stuff *was* enough to get rid of slap-echo and other wah-wah-wah crazy crap in a room that clapping could evoke. My stereo guru at the time preached doing the minimal amount to a room to make it acceptable, and those crazy corner-tunes at the the true 3-wall verticies worked wonders. ["Don't kill it".]
I reveal it here (as a changstar exclusive :)p7): putting a few phone-books in the bottom corners of a room can provide a very interesting tunable, akin to what corner-tunes can do at the ceiling points. [I like more in front (4-8") and fewer in back (3-5"), but it depends.] A tweak was never cheaper.

DaveBSC:

--- Quote from: thune on October 25, 2014, 07:07:35 AM ---If I remember correctly from Floyd Toole talking about these things, it's not so much the stuff itself but that "absorbers should be at least three inches deep". Some day, I'm actually going to read his book.

--- End quote ---

It depends on what frequency ranges you're trying to target for absorption. Traditional broadband adsorption panels that you might put at the first reflection points are typically around 2" thick. Bass traps on the other hand tend to be 4"+, and the lower you want to go, the thicker material you'll need. You can put a flat bass trap across a room corner leaving an air gap behind which will increase its effectiveness compared to having it flat on the wall, but a tri-trap in the corner will still beat it.

A 15x15 square is going to produce hellish bass modes, so that's definitely first thing that'll need to be dealt with if you want to get even half way decent response, and even after that, you're going to have to fight the square every step of the way.

lmswjm:
http://www.amazon.com/gp/product/B005V3L834/ref=ox_sc_sfl_title_6?ie=UTF8&psc=1&smid=A1S815T8HSYNPL

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