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Is this an appropriate diffuser setup?

My speakers are on stands about facing a wall about 6 ft behind them. As you can guess this is a less than optimal listening environment. Moving them is out of the question as is adhering anything like foam padding to the wall I was thinking about purchasing Auralex's SpaceArray http://www.sweetwater.com/store/detail/PSSA22 to install on the wall directly parallel to the speakers (i.e. about 5.5ft high on the wall) The monitors are Alesis M1 Actives, which I use primarily for DJing.

-Is the SpaceArray an appropriate solution?

-Is the placement correct?

-Is it worth $600?





Thanks TA

Can you give me the room dimensions and construction (ie sheetrock or brick walls) I also need the height and as much info as you can give me then I can model it for you.

quote:

Originally posted by Diginerd Can you give me the room dimensions and construction (ie sheetrock or brick walls) I also need the height and as much info as you can give me then I can model it for you.

standard sheetrock.
also, i should mention that the spacearray will be going between two bookshelves. there's a lot i left out of the drawing; but i figured it wouldn't really matter since i can't rearrange the furniture at all. (things pretty much have to stay as they are in the drawing...)

Ok, ho high is the room, width, height.. What is in there and in more detail..

Off the bat I'd say the difusor prolly isn't for you but if you get me the raw data I can prove it either way, and come up with what would work..

Also i need to know where there are windwos and doors please.

quote:

Originally posted by Diginerd Ok, ho high is the room, width, height.. What is in there and in more detail.. Off the bat I'd say the difusor prolly isn't for you but if you get me the raw data I can prove it either way, and come up with what would work.. Also i need to know where there are windwos and doors please.

i'll post pics tonight

quote:

Originally posted by Diginerd Ok, ho high is the room, width, height.. What is in there and in more detail.. Off the bat I'd say the difusor prolly isn't for you but if you get me the raw data I can prove it either way, and come up with what would work.. Also i need to know where there are windwos and doors please.

May I ask what tool you use for these calculations? This would be very handy for some resarch I need to do for university next year

CaraCAD

http://www.rhintek.com/cara/cara21desc.php

very cool piece of software. it lets you build a 3D model of your room, your speakers and funrinture, right down to what maerials / design everything is conructed with.

Once you have built your model you can start moving cainging things around to see how they change things. Finally, when you're set with the room design it can do some recursive tests to tell you where you need to site and put your speakers to get the best possible sound.

Finally, hen you actually have built your space it can generate test tones to compare its model against reality and then suggest changes to tweak your room that little bit further.

For the money it's amazing..

here's what my room looks like:

nice fish on the wall

quote:

Originally posted by ASFSE nice fish on the wall

yeah lets eat some fish !

quadratic mackeral diffuser

Ok, pic has helped clarify things. Now what i need are the dimensionsof the WHOLE ROOM including the bti behind the speakers (Not the bit in the photo).

Height, width, length.

60 inches behind monitors
72 infront of them (facing me):






and they're Alesis M1 Active MKII's if that helps

whole room is:
ceiling, 3 metres high
3.5 metres deep (depth from this picture) and 4.25 metres wide

the monitors are 110 cm and 210 cm from the wall on the right (the one with the door to the bathroom)

K, I'll model something out tonight / tomorrow for you. Taking a look I'd say that the diffuser is the least of your worries..

Nice teddy-bear

quote:

Originally posted by Synchronicity Nice teddy-bear

yep. living back at home for a while with my new job

quote:

Originally posted by Diginerd K, I'll model something out tonight / tomorrow for you. Taking a look I'd say that the diffuser is the least of your worries..

thanks diginerd!

quote:

Originally posted by Diginerd Taking a look I'd say that the diffuser is the least of your worries..

+1

Your problem is bad symetry and combfiltering at n*110Hz and n*87Hz. Both will not be solved by diffusion.

You'd have to move your speakers (which you said was no option), get a bigger room or place absorbers in front and/or behind your monitors (which will definately lead to some other problems with your room response)

on the other hand... without a proper symetric listening position I wouldn't even think of wasting money to acoustic gadgets.

quote:

Originally posted by halo +1 Your problem is bad symetry and combfiltering at n*110Hz and n*87Hz. Both will not be solved by diffusion. You'd have to move your speakers (which you said was no option), get a bigger room or place absorbers in front and/or behind your monitors (which will definately lead to some other problems with your room response) on the other hand... without a proper symetric listening position I wouldn't even think of wasting money to acoustic gadgets.

yikes. so much for a simple solution. how could I achieve a symetric listening position? move the setup to a different area? it's a bit difficult with all of the furniture and an L-shaped room

thanks for the response!

quote:

Originally posted by Tegu yikes. so much for a simple solution. how could I achieve a symetric listening position? move the setup to a different area? it's a bit difficult with all of the furniture and an L-shaped room thanks for the response!

Symetric position does not only mean geometrically symetric but also acoustically. Reflected sound from walls should travel the same distance an should be modified (or not) frequency-wise in the same way from both monitors to your listening position. As long as you cannot ensure that, forget the diffusor. The furniture in such a small room will already give you more diffusion, altough not controlled in any way, than a single dedicated diffusor can provide.

As your room is anything but a studio and your monitors are mainly used for DJing, I'd say forget optimizing that room.

He's right, though I may be tempted to turn your setup around so the speakers are nearer the wall, but I don't think you can do that from your descriptions.. :-(

well, thanks for the heads-up guys. i guess i saved a bunch of money

quote:

Originally posted by Diginerd He's right, though I may be tempted to turn your setup around so the speakers are nearer the wall, but I don't think you can do that from your descriptions.. :-(

Just turning the speakers will not remove the combfilter effect. Moving them closer to the walls will actually add to this until they are in plane with the wall or very, very close to this.

Which is what I was implying.. :-)

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