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rgp99
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Placement of Subwoofer

Hi,

Room Dimensions: 20x15
Screen : 90in LCD Projection
Receiver: Denon 4308Ci
Audio: M80V2
Subwoofer:EP600V2 horizontal

My query is, is it ok if I keep my woofer below the screen.

Nash Raj

Jan Vigne
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Re: Placement of Subwoofer

Sure, it's OK with me but that might not be the best place for it in terms of sound.

ethanwiner
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Re: Placement of Subwoofer

Nash, my standard blurb about subwoofer placement is below.

--Ethan

======================

There are programs that promise to help you locate the best place, but I'm sure they don't work as well as advertised. There are just too many variables like where the main speakers are, where you sit while listening, the crossover frequency, how much bass trapping you have or are willing to have, and so forth.

When I bought my Carver Sunfire a few years ago, I tried a variety of places. Then I looked in the manual and it said to put it in one of the front corners. Bingo, that was clearly the best place. More recently I got an SVS PB12-Ultra/2 subwoofer and noticed that its manual also said a front corner is best. By then I didn't even need to experiment. I put it there and it's even more fabulous than the Sunfire.

That said, a front corner is clearly the loudest location, but it won't be the flattest unless you have a fair number of bass traps. Loud works for me but I also have 42 traps in my living room home theater and they reduce the problems (peaks, ringing) you get with corner placement.

The only way to know for sure which place is best is to measure the response. But you need to measure to a high resolution such as 1 Hz intervals. This can be time consuming because moving the sub even an inch or two can make a real difference. So you end up measuring, moving, measuring, moving, and so forth for the better part of an evening. You can get software to do this more efficiently.

One useful method is to put the subwoofer at the listening position on a chair, then play some bass-heavy music and crawl around on the floor listening for where the bass is the most even. Once you find the best place by ear, put the subwoofer there. One problem with this is the key of the music affects what you hear. If the music has tones that align with the room's modes, then this method can work pretty well. But if the music is in a key that doesn't excite the room modes, then other music that does excite the modes may sound unbalanced. One solution is to use pink noise instead of music. This short article on my company's web site explains this in more detail, and there's a low frequency filtered pink noise MP3 file you can download:

www.realtraps.com/lf-noise.htm

But again, the only way to know for sure where the low frequency response is flattest is to measure.

Jan Vigne
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Re: Placement of Subwoofer


Quote:
then play some bass-heavy music and crawl around on the floor listening for where the bass is the most even.

Ya'know, I've never understood that crawl around on the floor thing. First, it's not like bass waves are so tiny they can only run along the floor. Bass sounds pretty much the same standing up or laying down. Second, has no one thought to get a subwoofer up off the floor?

Elk
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Re: Placement of Subwoofer

I remember a review of a subwoofer stand that does get the sub off of the floor. It is designed for rooms with eight foot high ceilings. One of the columnists reviewed it and liked it.

Kal Rubinson
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Re: Placement of Subwoofer


Quote:
I remember a review of a subwoofer stand that does get the sub off of the floor. It is designed for rooms with eight foot high ceilings. One of the columnists reviewed it and liked it.

Yup. Link:
http://www.stereophile.com/musicintheround/904music/index1.html

Elk
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Re: Placement of Subwoofer

Thanks, Kal.

Now you know for certain that at least one of us reads your work.

Kal Rubinson
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Re: Placement of Subwoofer


Quote:
Now you know for certain that at least one of us reads your work.

Good. I don't have the patience to do so.

Kal

resonance58
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Re: Placement of Subwoofer

I know that there is a lot of misinformation about this topic. I found this on the web and it is very accurate and easy to understand.

http://youtube.com/watch?v=xe-phE223vM

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