08-Aug-2015, 07:32
That's true, f1eng. Thanks for the correction.
In my previous house I spent many, many hours in a vicious cycle of moving the speakers and measuring. Changing the position of the speakers and/or microphone most definitely changed the measurements but there was no position where they looked particularly good. The measurements and perceived sound did not necessarily correlate either. I tried the 'golden ratio' and other favored placement strategies and ultimately wound up putting them where they struck a reasonable balance of aesthetics and acoustics. I bought several Mondo bass traps and they did surprisingly little, at least in the bottom few octaves where the most aberrations were present.
Here is a photo I found of a very nicely done room incorporating Helmholtz resonator absorbers and diffusers - so it can be domestically acceptable. If I ever build another house I will definitely consult with an acoustics specialist and try to do it right in the construction phase. Retrofitting a typical home theater or other room is never easy.
![[Image: imgext.php?u=http%3A%2F%2Fwww.engelholma...1e8542790e]](https://static.gearslutz.com/board/imgext.php?u=http%3A%2F%2Fwww.engelholmaudio.com%2Flevel3_4.jpg&h=6a2b9d3cab4a641dc0b81c1e8542790e)
One major drawback to active correction is that its effectiveness is inversely proportional to the size of the 'sweet spot' - optimal correction is only possible at one specific position. Also the ability to fix nulls is extremely limited, although they are not as audibly destructive as peaks that are easily handled.
I will say that measuring one's system for the first time is quite eye opening... First time I did it I was stunned, after being accustomed to typical +/- the 3dB manufacturer plots which are taken near field in an anechoic chamber.
In my previous house I spent many, many hours in a vicious cycle of moving the speakers and measuring. Changing the position of the speakers and/or microphone most definitely changed the measurements but there was no position where they looked particularly good. The measurements and perceived sound did not necessarily correlate either. I tried the 'golden ratio' and other favored placement strategies and ultimately wound up putting them where they struck a reasonable balance of aesthetics and acoustics. I bought several Mondo bass traps and they did surprisingly little, at least in the bottom few octaves where the most aberrations were present.
Here is a photo I found of a very nicely done room incorporating Helmholtz resonator absorbers and diffusers - so it can be domestically acceptable. If I ever build another house I will definitely consult with an acoustics specialist and try to do it right in the construction phase. Retrofitting a typical home theater or other room is never easy.
One major drawback to active correction is that its effectiveness is inversely proportional to the size of the 'sweet spot' - optimal correction is only possible at one specific position. Also the ability to fix nulls is extremely limited, although they are not as audibly destructive as peaks that are easily handled.
I will say that measuring one's system for the first time is quite eye opening... First time I did it I was stunned, after being accustomed to typical +/- the 3dB manufacturer plots which are taken near field in an anechoic chamber.
