Speaker placement across the longer wall

Hello !!! I have a verry wide control room and I want to place my monitors across the longer wall. I have seen similiar setup ("Music Farm"). My room is 5 meters wide and 3 meters deep. I woud like to know how should I sound proof it later and why speakers are almost always setup across the shorter wall ?

Aloha and welcome to the forum! :D Congrats on your studio build! Any chance you could please:

Edit your profile to include your location. This is very important, because this is a worldwide resource, and as such, material costs and availability vary widely. For example, masonry is cheaper than gypsum in some parts of the globe, whereas it's the exact opposite in other regions.

You'll probably get more of a response by doing so and this will really come in handy two or three posts down the road. It's also part of the forum guidelines: http://www.johnlsayers.com/phpBB2/viewtopic.php?t=7572 http://www.johnlsayers.com/phpBB2/viewtopic.php?t=3231 Thanks! :wink:

I woud like to know how should I sound proof it later and why speakers are almost always setup across the shorter wall ?

From the SAE website - http://www.saecollege.de/reference_material/index.html

because you don't want rear reflections to interfere it is better to start with a longer front to back dimension than the side to side dimension. i.e. 6m x 5m. - John Sayers

Hope this helps, Aloha 8)

Ok I`ve read the sae rference materials long ago and just didint found the location field... I just want to know is my room big enough for the setup ? I am asking about the soundproofing bacause I think it will be a little different than in the default case. I`d like to know why for example in the Music Farm Studio they placed the speakers acoss the longer wall. I also think that its an interesting problem and I cant find anything about the setup in the forum.

Aloha,

I just want to know is my room big enough for the setup?

How tall are your ceilings?

I am asking about the soundproofing bacause I think it will be a little different than in the default case.

Just for clarification; when you say "soundproofing" do you mean "isolation from sound entering/leaving your room" or do you mean "acoustic treatments?" And to what are you refering to as "the default case?"

I`d like to know why for example in the Music Farm Studio they placed the speakers acoss the longer wall.

Perhaps a PM to John would best answer the "why?"

I also think that its an interesting problem and I cant find anything about the setup in the forum.

Again, for clarification; what do you mean by "the setup?" Are you refering to setting up your "mix position?" Aloha 8)

przemek wrote:

I just want to know is my room big enough for the setup?

I don't think so because the wall behind you will be too close. The graph below shows the same room with the speakers facing the short way and the long way. It's quite clear that having the speakers fire the long way down the room is better. That room is a little smaller than yours, but the same principle applies. --Ethan

Ok I am asking about soundproofing beacause I would like to know how to make the room sound better with the speakers set across the longer wall. I know that there is a problem with the reflections from the rear wall but I would like to know how people are fighting with them. I have to set my monitors in that way and I woud like to know how to make my room sound good with this setup. Default setup for me is with the speakers set across the shorter wall. Sorry that my english is so poor, Maybe I am hard to understand. Oh and my room height is 2,40 Thanks for help anyway. I`ll post the drawing of my room in few hours.

I don`t know maybe I should move the post to Studio Design section ? Anyway here is my situation the drawing shows my control room in its current state. It was part of some kind of factotry and there was the window I just put different frame and thicker glass. I cant move it and I cant move the dors. I cant afford total rebuilt etc. I just want the room to sound better (more even and with more precise stereo) and I dont know what to do. I looked at the http://www.johnlsayers.com/HR/index1.htm but that is not my situation. If I set my speakers across the shorter wall I won`t be able to see anything thru the window. The walls are made of brick. I just need an information what absorbers to use and where to place them.

Hello przemek, You don't have enough space for that setting. You need absorbers behind and between your speakers and on the rear wall. The thickness would have to be 20-30cm. It makes much better sense to use the room in the other direction. On the top of that you're not supposed to have you computer screen facing a window.

Yeah I know this but I am still looking for a good solution. As I said before I cant move the window and I need it. If I move it My building is gonna crash :( If i could use it in other direction I would copy one of John`s projects but its not an option unfortunetly. I wouldn`t bother you if I could change the speaker placement. To be clear Behind the window is my rehersal room. It is not hard to make good sound in a good big room ... I thought I can Hang some kind of diffusors on the rear wall. Also thought about buliding some angled flat board whitch would redirect the first reflection from the rear wall to side walls.

Just a thought. Maybe I could make the board like slat resonator, then I would have 2 in 1 :). With an addition of another two in rear corners and some clouds maybe the room could work. Or am I insane ? Come on people show me that you can figure out something clever.

przemek wrote:

Just a thought. Maybe I could make the board like slat resonator, then I would have 2 in 1 :). With an addition of another two in rear corners and some clouds maybe the room could work. Or am I insane ? Come on people show me that you can figure out something clever.

Sorry, this is not going to work. You need thickness to control the bass frequencies. I would go for John's design, increasing the thickness of the front and rear absorbers from 8' (20 cm) to 12' (30cm). It means you are going to loose 60cm in treatment. I would'nt chance doing it any thinner. I don't think you would need the lateral wall treatment for a start, maybe only a few angled wood panels to control flutter echo. Of course you'll need an opening in the front absorber to be able to see through the window. Please find a metric drawing attached to this message. No sketchup yet ;)

On the rear wall is a window it is 1,5 m wide, I wanted to remove it so I didnt included it in the drawing. My walls are 25cm thick. I think I could fill the window with some thin bricks and then I could use the remaining space to fit in a part of the absorber I could get about 15 cm for free :D. Is it a good idea ? Gotta figre out something about the front wall and the observation window now....

you need to cover pretty much all the rear wall anyway...

J`ve read that the John`s rear and front absorbers are just absorbing mid and high frequencies so why do you tell me that I need realy thick ones to get rid of low end ? Sorry but I am quite confused and not really shure if you aren`t wrong.

przemek wrote:

J`ve read that the John`s rear and front absorbers are just absorbing mid and high frequencies so why do you tell me that I need realy thick ones to get rid of low end ? Sorry but I am quite confused and not really shure if you aren`t wrong.

The corner absorbers are dealing mainly with the room modes, and the front and rear absorber are dealing with the SBIR. The thicker the better for low frequencies absorption.