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In Reply to: Re: room echos posted by nevillewoo@yahoo.com on April 03, 2004 at 08:49:59:
here is the bar code number that lowe's scanned to get the price...42369 10506. they have a white vinyl textured front. the onyly thing is you see the fiberglass on the edges. i am thinking about painting the edges the same color as my walls.
Follow Ups:
Thank you for providng the product code. I will visit them tomorrow morning. Have you also applied them by using a mirror and where you can see the speakers, is the spot you place the panels ? Thats what I plan to do with them...Today, I bought some fiberglass and wood and plastic "fencing, in th ehoe of making some base traps next weekend.
i started out placing one in the middle and at the top of each of the long walls as my speakers are on the short wall there was still some echo in the end of the room where the speakers are located so i placed one each on the long wall at the corner of the end where the speakers are located. there is still a small amount of echo if you clap real hard so i am going to get four panels and double stack them behind each speacker to see what happens. another thing came to mind what if you glue two or more panels together to make thick panels? i might have something here. besides they are only $4 bucks a panel or $65 for a case of 16.
These kind of panels are intended for use as ceiling tiles, and while they do absorb a god amount of midrange energy, they do not absorb all the HF's, and do not absorb much bas at all.They can be improved by a very easy and chaep tweak, cover the surface with polyester batting, and then with a cloth (burlap/jute or speaker grille cloth is the best), this improves the mid and HF absorption.
As far as positioning goes, there are some general rules of thumb that have been worked out for best usage and placment of small to moderate amounts of absorbing material, see:
http://www.geocities.com/jonrisch/a1.htm
toward the end.
Jon Risch
John, your article mentions the use of cheap Walmart blankets....can the pink fluffy fiberglass be replaced by these blankets ?Did you find that the bass traps had to be of a certain height and width before it yielded good results ?
Thanks
Neville
First, the mention was of the use of polyester batting, which is used as and available for comforter or blanket stuffing, whioch is carried by WalMArt and at fabric stores. Not blankets as such.Second, resistive based ASC style bass traps need to be as big as one can accomodate and build, the upper limit for practical construction being approx. 16-18" in diameter. It is the internal VOLUME that determines how low and how much at low frequencies they can absorb. A pair of 4 or 6 foot tall ones in the front corners (or two 3 foot tall ones in each corner), and the same or 3 foot ones in the rear corners, is enough to do some good and damp a room's bass, flattening the response slightly, and reducing room modes and obvious resonances.
A diameter of 12" is enough to do some good to, just not down as low.
Jon Risch
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