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Whats the best positions for surround sound speakers and a 92" projector screen?

post #1 of 13
Thread Starter 
i am starting to drywall and need to tell my contractor where i want my speakers mounted. i am going to have a 92" fixed screen for my projector. i am also going to have some type of stand under the screen for my components. my question is where is the best place to mount/place my surround sound speakers. i was going to put the center channel under the screen on the stand. where is the best place to position the front left and right and the rear speakers. i was told by different people to put the front left and right about 23" above the ground, i was also told to have the front left and right even with the center channel. i also got different information about the rear speakers about the distance to mount the rear speakers. i am going to wall mount them with brackets but am looking for how high from the ground and do i put them behind me or even with the couch.
post #2 of 13
Thread Starter 
anyone..i have to make a decision quick.
post #3 of 13
Quote:
Originally Posted by one028 View Post

anyone..i have to make a decision quick.

Take a look at www.dolby.com. I assume you are doing a 5.1 setup. Click on the room setup and there is plenty of information from the experts on how to set up for Dolby 5.1 sound. Also look at THX site.
post #4 of 13
Why will your components be under the screen? Typically in a home theater the audio / video components are at the rear of the room.

I don't have answers for your questions about how high to mount the speakers but I am very interested in any answers also as I am finishing out my home theater and have to make those decisions soon as I rewire.
post #5 of 13
Mount the Center channel under the screen and tilted up to aim at the viewer's heads. Mount the L/R speakers on each side of the screen, angled slightly towards the viewers (as required - trial and error for best sound field). The center of the L/R speakers can be slightly higher than the center channel, if that unit is aimed upwards (it depends on the size of the L/R speaker cabinets).

The center channel speaker should not be mounted above the screen (in general).

For a 5.1 surround system, the surround speakers shoud be on either side of the viewers and near (about a foot below) the ceilihg (they should be near the center of where the viewers will sit - 1 or more rows). The surrounds should be aimed over the viewers heads. If the surrounds are not bi-pole of di-pole speakers, then they should not be aimed directly at each other.

Sub-woofer placement will depend on where it sounds best.

NOTE: There is a good article, A Tale of Two Rooms, in the February 2007 issue, page 44, of Home Theater Magazine - you might be able to find it on their online site.
post #6 of 13
BTW, the front speakers should not be placed directly against the wall. The L/R speakers also should not be placed in the corners of the room either - closer to the screen edges is better , but it depends on how much space you have between the sides of the screen and the side walls of the room.

In my case, all of my front speakers are under my screen, and a foot off the back wall. My L/R fronts are under the left and right edges of the screen (about 2.5' from the side walls). The screen is about a foot in front of the speakers (4' off the wall - the normal TV set is also behind the screen, as are my LR windows and drapes). This arrangement seems to give me a very good sound field. My set-up is not normal, however, for a dedicated HT room.

My room is 13' wide (26' long) and I have a 106" retractable screen. I have to very carefull about speaker placement to avoid room resonances.

EDIT: I think what hmcewin was referring to was http://www.dolby.com/consumer/home_e...oomlayout.html. This is pretty much a standard 5.1 setup. The AVIA "Guide to Home Theater" calibration disk also has some suggestions in their introduction video.

Audioholics also has some good articles on their website: http://www.audioholics.com/techtips/...akerlayout.php is one of them. It has some good tips on speaker placement, especially the surround channels.

notlad -- My equipment is along the side wall, about 1/3rd of the way between my front speakers and my PJ and surround channels. My rear channel speakers (when I get the 7.1 channel system set up) will go along the back wall.
post #7 of 13
Thanks CT_Wiebe; I had some of the same questions as the OP and your posts are very helpful.
post #8 of 13
You're welcome. I've been messing around (technically = experimenting) with audio ever since I was in college (that was over 50 years ago ), so I guess I have a little experience .
post #9 of 13
Quote:
Originally Posted by CT_Wiebe View Post

The center channel speaker should not be mounted above the screen (in general).

If you have more than one row of seats, mounting the center channel above the screen is actually prefered. It should then be angled downwards.
post #10 of 13
Quote:
Originally Posted by ktoolsie View Post

If you have more than one row of seats, mounting the center channel above the screen is actually prefered. It should then be angled downwards.

By whom and why??

If I mounted my center above my screen it would be near the ceiling. Don't think that would be desirable. The idea for the center speaker is to keep it as nearly as possible in the same plane as the R/L front speakers and about ear height.
post #11 of 13
Quote:
Originally Posted by hmcewin View Post

By whom and why??

If I mounted my center above my screen it would be near the ceiling. Don't think that would be desirable. The idea for the center speaker is to keep it as nearly as possible in the same plane as the R/L front speakers and about ear height.

True, but if you had two or three rows of seating the viewers in the back rows would not get optimal center channel dialogue.
post #12 of 13
The center speaker has most of the dialogue. It is closer to the speakers mouth when mounted above the screen. I tried it above and below and MUCH preferred it above angled down, rather than below angled up. I sat it on a low stool angled up and hated the sound, it sounded muffled to me. All is good again after mounting above. On my RPTV before I got an HD70 the center speaker sat on top of the TV.

Robert
post #13 of 13
If you have multiple rows of seating, then then mounting the center channel above the screen may be a better solution (other than using an acoustically transparent screen, which has it's own set of problems). Top mounted senter channel does have to be angled downward though (most likely aimed towards halfway between the front and last rows. The idea is to present a uniform sound field to all the listners. You probably also will have to mount the L/R speakers up higher also (since they will also be masked by the front row of seats).

There are a number of publisned articles and papers on the subject (including ones on the Audioholics web site - and possibly the THX and Dolby sites also). For multiple rows, do your research, there is no shortcut (unless you want to spend the money to have a professional set up your HT for you).
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