Building HT with 4 concrete walls. Need to get rid of Echo. Help

[fred87nc]

Originally Posted by jomari

it shouldnt be. did you have it custom made? what screen material did you use or chose?

the only way to see if it would cause a problem would be using the projector you're getting. or, you can try using a flourescent bulb, and see if the light would 'show' you the crease.

just to make sure we're both on the same page.

are we talking about a crease or a fold?
or are we talking about two pieces of fabric, sewn together?

glad to see your still around bud. and yes, the metric system is a pain in the butt...

about risers, well, im sure a couple of experts here can chime in.

It was custom made, well I gave him the sizes, I didn´t expect him to use that material, I order it online. Now what color should I paint the wall behind. cause I can the color behind . And I´m using the projector the mitsubishi hc1600, is this going to be a problem? Im getting it in a week or so. i got the clearance for the projector that far away. the room is like 9 meters long.

and the middle is like umm a fold i guess. Ill get pics of the screen and I´ll upload them tonight. thanks for the help.

[jomari]

Originally Posted by fred87nc

It was custom made, well I gave him the sizes, I didn´t expect him to use that material, I order it online. Now what color should I paint the wall behind.

hmm. the wall behind the pj screen im assuming? if so, id paint it a flat or matte black. better yet, covering it up with black cloth so that light doesnt 'seep' through.

And I´m using the projector the mitsubishi hc1600, is this going to be a problem? Im getting it in a week or so. i got the clearance for the projector that far away.

im not so updated anymore with pj's but ive always used a couple of great websites, including projector central for all my project research. great website.

and the middle is like umm a fold i guess. Ill get pics of the screen and I´ll upload them tonight. thanks for the help.

we'd love to see your pictures and hope to assist you further with your project. great job by the way! never hurts to ask!

[CollinViegas]

If you want to deal with the echo problem line the bottom half of the walls with a duct liner like linacoustic and the top half poly batting. Cover it with GOM fabric. you can use your trim to cover the stapels for the fabric. This will cost roughly as much as carpeting the walls, but will actually help your problem and also help to acoustically treat your room.

Contrary to popular belief carpeting your walls will do nothing for your room acoustically and will do nothing regarding the slap echoes you are hearing. Carpet has very little acoustic value.

[jomari]

Originally Posted by CollinViegas

If you want to deal with the echo problem line the bottom half of the walls with a duct liner like linacoustic and the top half poly batting. Cover it with GOM fabric. you can use your trim to cover the stapels for the fabric. This will cost roughly as much as carpeting the walls, but will actually help your problem and also help to acoustically treat your room.

Contrary to popular belief carpeting your walls will do nothing for your room acoustically and will do nothing regarding the slap echoes you are hearing. Carpet has very little acoustic value.

i could also recommend building acoustic panels, but then again,i was trying to help him with a 'simple' solution for the meantime. simply put, i was also being economical. we could go full blown for treating it properly, but then again, he might end up broke afterwards. hes building the theater for a smaller town in mexico, and using it as their 'cinema' over there.

[CollinViegas]

But I also noted that he was going to put carpet on the wall. To do a room of that size would cost more than the method I posted and is economical in comparison.

A 100 foot roll of linacoustic can be had for $150, poly batting even cheaper. Furring strips cost almost nothing, staples etc are all cheap.

The only part that is a bit expensive is the GOM fabric, which can be found for roughly the same price of cheap carpet/Glue combo when you do it by Sq footage...

The only thing is, the way I mentioned may take a little longer to build but can be done in a day or two. And he will have something that deals with his problems aswell as provides him with the extra gains of an acoustic environment. sounds like a win - win to me

[jomari]

Originally Posted by CollinViegas

But I also noted that he was going to put carpet on the wall. To do a room of that size would cost more than the method I posted and is economical in comparison.

A 100 foot roll of linacoustic can be had for $150, poly batting even cheaper. Furring strips cost almost nothing, staples etc are all cheap.

The only part that is a bit expensive is the GOM fabric, which can be found for roughly the same price of cheap carpet/Glue combo when you do it by Sq footage...

The only thing is, the way I mentioned may take a little longer to build but can be done in a day or two. And he will have something that deals with his problems aswell as provides him with the extra gains of an acoustic environment. sounds like a win - win to me

understood. but i guess my suggestion was to put A carpet on the wall (the back wall to be particular), and then work with the other walls later on.

i agree that the carpet all the way scheme wouldnt be cost effective, nor a great idea. im sure that the linacoustic could be a great way to deal with the echo, heck we can even use polyfill for lining up the wall panels, et al, but we havent had the chance to actually 'look' into the room.

[CollinViegas]

Also instead of painting behind the acoustic screen you should cover that wall in 2" linacoustic to fully deaden it. It will provide you with much better imageing and a clearer soundstage. Also it does not need to be covered with fabric because it is already a dull black and is very cost effective.

The main benefit to using an acoustic screen is the fact that you can treat the wall behind it and not have the screen as a giant reflection point at the front of the room.