Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

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RE: An alternative approach

Posted by David Aiken (A) on May 23, 2009 at 13:47:59

In Reply to: RE: An alternative approach posted by junaid5888@yahoo.com on May 22, 2009 at 02:10:20:

I don't know whether side wall first reflections cause the midrange to image too much to the front. I think there's too many variables involved with those reflections, or any reflections, to predict some effects reliably. The strength of those reflections are affected by the speaker's polar distribution pattern and angle of toe in and also by the reflectivity of the walls.

Definitely try the 2' x 4' panels at the first reflection points. I think your results will improve. That will leave you with the 9" traps spare and if your room is high enough you can try stacking them on top of the traps in your front corners which should help a bit more with control of bass modes.

You said your DIY treatments were unwrapped. If they're fibreglass and you have the fibreglass exposed, I think you should at least wrap them in a thin covering of polyester batting in order to prevent fibre release. Fibreglass may not be considered carcinogenic but fibres in the lungs can cause other problems. I think it would be hard for an adult to get a high enough concentration from exposure to unwrapped traps unless the fibreglass material was deteriorating badly but if you have carpeted floors any loose fibres are likely to collect there and small children playing on the floor are likely to receive higher exposure levels because they're more likely to disturb any fibres trapped in the carpet and also because they're going to have their mouth and nose much closer to the carpet than an adult which means they're more likely to breathe in any disturbed fibres. I'd still prefer to cover them with a cloth cover as well. Jon Risch recommends burlap which you may know as "hessian" which is what it's called here in Australia.




David Aiken

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