or Connect
New Posts  All Forums:Forum Nav:

False wall & speaker set up

post #1 of 22
Thread Starter 
Hello all,

I am in the process of finishing my basement and it was just recenlty framed. I have been debating the idea of where to put speakers, screen, etc. and it was suggested on this forum that I build a false wall to hide all speakers and accomplish my goal of a nice clean look without having to buy new speakers.

But before I start asking questions about how to build the false wall or speaker placement I need to know if 2' is enough room for my LCR speaers and sub?

The front wall of the room where the TV will be located is currenlty framed into a 2'x16'6 box. My speakers are JBL Northridge E80 L&R and EC35 center. The E80's are 13" deep and the EC35 is 10" deep. Does 2' behind the screen leave enough space so the sound of the speakers will not be affected?

I figure I needed to know if these speakers will work in this space before I worry about how to build the false wall and everything else.

I think I attached a layout of the room

Thank you very much for all of your help!

Derrick Hoj

 

TV_Bar room.pdf 148.97265625k . file
post #2 of 22
how far away from the wall are the fronts of your speakers now? When thinking about a false wall, don't think of it as a wall, think of it as fabric stretched wall to wall, floor to ceiling.
post #3 of 22
Thread Starter 
At this point I don't have any speakers set up. The basement is all bare framed walls.

I am very much a noob to all of this. I used this site to buy all my speakers, receiver, etc for my 5.1 set up and have been very happy with it for a long time. Now we have moved into a new house and I am going to finish the basement and would like the large screen for movies, TV, and sports. As you can see from the attachment it will not be an exclusive home theather as the bar is in the back and there will likely be a small tv behind the bar.

The L&R JBL speakers I have are 13" deep....which obviously only leaves 9" clearance between the back wall and front of the screen/wall. Is that enough?
post #4 of 22
Thread Starter 
Quote:
Originally Posted by DjHOJ View Post

The L&R JBL speakers I have are 13" deep....which obviously only leaves 9" clearance between the back wall and front of the screen/wall. Is that enough?

After reading my post again I realize this doesn't make any sense.

So....space behind the false wall is 24" deep -- my JBL speakers are 13" deep -- which only leaves 11" clearance for the front and back of my speakers. Is that enough room?
post #5 of 22
Yes.
post #6 of 22
I used 2' from the wall to the front of the false wall, so behind is actually only about 21" (2x3 framing) - and have my LCR and two huge subs back there, and it has worked out well. If I was doing it again, I might add a couple inches, just to have a little more room to operate. If you deaden the front wall sufficiently, you address SBIR - and can move the frequency at which SBIR happens higher (where the absorption can address it more easily) by moving the speakers closer to the wall.
post #7 of 22
2' minimum behind wall IMO. Most subs and mains will fit behind there but you wont have room to get back there and walk around....

Generally youll want your speakers up closer to screen than wall for many reasons.

Go false wall and dont look back
post #8 of 22
Thread Starter 
Ok - so it sounds like the speakers I currently have will work.

Can you guys direct me to some threads that explain the basic (I am very much a noob) like:

- Speaker placement inside the wall - how far apart does each speaker have to be?? How high?
- Where to place the sub?
- Placement of the screen on the wall - how far should it be from ceiling and floor?
- What type of sound proofing is needed behind the false wall?

Sorry for all the questions but I am very new to this. Being a complete noob I know it doesn't have to be perfect because I am too ignorant to know the difference on most things.....but I would like to try and get it right

I am hoping to sit 12' away and use a 90" screen if possible. I know the dimensions of the screen are 44.5h x 78.3w. Does this mean I can just frame out the area behind the screen to hold all speakers and place then mount the screen to cover everything? Once the screen is mounted can I drywall up to the edge of the screen?

Sorry for all the questions but I really do appreciate your time
post #9 of 22
Quote:
Originally Posted by DjHOJ View Post

Ok - so it sounds like the speakers I currently have will work.

Can you guys direct me to some threads that explain the basic (I am very much a noob) like:

- Speaker placement inside the wall - how far apart does each speaker have to be?? How high?
- Where to place the sub?
- Placement of the screen on the wall - how far should it be from ceiling and floor?
- What type of sound proofing is needed behind the false wall?

Sorry for all the questions but I am very new to this. Being a complete noob I know it doesn't have to be perfect because I am too ignorant to know the difference on most things.....but I would like to try and get it right

I am hoping to sit 12' away and use a 90" screen if possible. I know the dimensions of the screen are 44.5h x 78.3w. Does this mean I can just frame out the area behind the screen to hold all speakers and place then mount the screen to cover everything? Once the screen is mounted can I drywall up to the edge of the screen?

Sorry for all the questions but I really do appreciate your time



1) Speakers will be placed based upon where your framing is, and then how wide your screen is, and whether or not it is acoustically transparent (AT). Height should have tweeters at seated ear height. Will create a better soundstage if you use all the same speakers for LCR. (That will likely mean AT screen).

2) Again, based on where it sounds best. A lot of folks put them between the center and L/R if you want them behind the false wall.

3) Sit in the area and get a sense of where your sight lines are. I typically have slightly more space at the bottom than the top, but again, that will depend on your ceiling height. Project the image on the wall to start and get it to the same size of your screen. Move it up and down. Sit it your chair. Where does it look good to you, and not produce eye strain? Mark the bottom of the image with painters tape and then get out the tape measure and a pad and pencil. Work the numbers to determine how to build your false wall and screen support. Keep in mind the sight lines if you have a riser in the back.

4) 1"-2" Owens Corning QuietR or Linacoustic.

FYI ... 90" at 12' is going to look small. I suggest you throw the image on the wall and make it bigger and smaller while you are determining height of image. Go with what you like, but IMO, 90" @12' is not going to do it for you.

Check out these two threads...

BIGs, on false wall construction... http://www.avsforum.com/avs-vb/showthread.php?t=837848

And mine with picture of area behind false wall at the bottom... http://www.avsforum.com/avs-vb/showthread.php?t=1319933

Also this one... http://www.avsforum.com/avs-vb/showt...php?p=21598523

Good luck. Keep us posted.
post #10 of 22
Quote:
Originally Posted by DjHOJ View Post

The front wall of the room where the TV will be located

So roll down screen then for the projector?
post #11 of 22
Thread Starter 
[quote]
So roll down screen then for the projector? [quote]

Sorry for the confusion - I said TV but meant the projector screen. The projector will be the only thing used in this room for TV, Movies, sports, etc.

- I want to use an AT screen

So from what I see it appears most people have their screen mounted and then use some sort of screen panels around the sides and top and bottom of the screen. But is this necessary?

If I build the area directly behind the screen to hold my speakers - sound proof it - mount the screen - and then drywall that wall right up to the edge of screens frame will that work? Or will the drywall being that close to the screen mess with the sound?

Hope I am explaining this correctly?

I am hoping for it to look like a normal painted wall - with screen mounted - and all speakers hidden in the back of the screen
post #12 of 22
I wouldn't drywall it.

You could go my direction for my latest iteration, and get a screen that is within a couple inches of each side wall, and then you would have very minimal fabric screens to build.

Drywall will effect the sound, even if all speakers are behind the AT screen.
post #13 of 22
I thought the same thing as ADD on screen size - but a lot of it is preference, some like to sit in the front row at the movie theater, others in the back, or middle - I like immersive, and settled on 136" wide from 12' front row.
post #14 of 22
Holy crap! 136" at 12'?!? That's gotta be enormous.
post #15 of 22
Still not as big as tony123 or MoparMudder
post #16 of 22
never drywall a false screen wall, you are creating a huge resonant cavity (echo chamber).
post #17 of 22
Quote:
Originally Posted by NicksHitachi View Post

2' minimum behind wall IMO. Most subs and mains will fit behind there but you wont have room to get back there and walk around....

Generally youll want your speakers up closer to screen than wall for many reasons.

Go false wall and dont look back

i went 30". And good thing, I have a 18" CHT Sub, and the enclose is 24"x24". tight fit
post #18 of 22
If you use a material like Seymour AV XD material.......12 feet is starting to push the point where you might start to see the weave.
post #19 of 22
Quote:
Originally Posted by BIGmouthinDC View Post

never drywall a false screen wall, you are creating a huge resonant cavity (echo chamber).

I agree, I wrapped my framing with material that matched the colour of my walls.
post #20 of 22
Quote:
Originally Posted by Crabalocker View Post

If you use a material like Seymour AV XD material.......12 feet is starting to push the point where you might start to see the weave.

According to Seymour:

Quote:


Center Stage XD is a woven fabric and while it is nearly the smoothest texture woven material available, it is not a sheet of vinyl. For acoustic reasons, this is an advantage, but if you're going to sit 8 feet or closer and tend to watch the pixels instead of the movie, you may have sharp enough vision to make out the texture of the fabric.

I use the Seymour XD material on my screen - out of the many who have visited to watch, I did have one of my son's friends mention that he could see the holes (while sitting in the front row, 12' from the screen). He must have a LOT better eyes than I do, I can only see the weave from much closer, maybe around that 8' that Chris mentioned above.

Best way to tell if you or your family can see it is to order a free sample and tack it up at the appropriate distance.
post #21 of 22
This is based on my experience.........I sit 15' back and can't notice it, at 13' still nothing.....but at 12' I start to notice a bit in bright scene's....and my eyes aren't great either.

I'm just passing on my experience.......
post #22 of 22
Quote:
Originally Posted by Crabalocker View Post

This is based on my experience.........I sit 15' back and can't notice it, at 13' still nothing.....but at 12' I start to notice a bit in bright scene's....and my eyes aren't great either.

I'm just passing on my experience.......

Sorry, I didn't mean to come off as "no, you're wrong", just sharing some additional data points. Everyone's eyes, room, etc. are different, so best to get a sample and try it first.
New Posts  All Forums:Forum Nav:
  Return Home