Tuesday, January 8, 2008

Acoustics for Hi Fi and Home Theatre

In the modern home there seems to be a minimalist design trend at the moment. It uses tiles and wood floors, long flat rectangular walls and ceilings and lots of glass. Quite the opposite of some years ago where everything was upholstered, carpeted and curtained. They also have a lot of open plan design with lounge, family room, dining room and kitchen often running into each other.
These type of rooms have no chance at all of being good for listening to stereo or home theatre. They are an acoustic nightmare and it doesnt matter what equipment you use, it will not reproduce the program as intended by the recording engineer/artist. To get some idea of why, consider the environment it was engineered in and what a good listening room is like. First and foremost, since we have 2 ears, one each side of our head, the room MUST be symmetrical. It can't have reflections or reverberation that is sufficient to interfere with the sound from the speakers and it cant have direct reflections in the immediate area - like hard walls and ceiling. The size of most listening rooms is similar to the length of bass frequencies which means physical effects like standing waves will occur. Some form of control commonly known as bass traps must be used as this effect can not be corrected electronically.

Ultimately, if you are striving for a genuine reproduction of what was recorded you need a dedicated room!
So what's the point of this rant? It doesn't mean that unless you have a dedicated room you shouldn't have a HiFi or a home theatre, but you should set your expectations properly and perhaps not spend money on relatively very expensive marginal improvements like some of the crazy cables available. It means that if you have a room that is not ideal, don't go crazy on acoustic treatment either. Just get whatever soft furnishings, rugs etc that you can in there. Perhaps use some acoustic treatment that can also be decorative like the Fonic Acoustics Designer Panels. Don't spend time, money and effort trying to make such a room sound perfect because you won't be able to. Don't pay people to advise, measure or sell you anything other than the basics. Have the right expectation that it will sound OK or possibly even good but not sensational or anything like the real thing.

I write this because I get so many calls from people who have bought very expensive gear and put in a beautiful modern home and it doesn't sound good at all. They ask me to consult and fix it which as I said is almost impossible. My point is that this would be a lot more acceptable if their expectation was reasonable at the outset. HiFi and home theatre sales people should be able to make this clear to their customers at the time of sale. They may not get quite such a big sale but will have customers who aren't dissapointed when they get home and are much more likely to be return customers.
Some more information can be found in the articles here - http://www.ultrafonic.com.au/Articles.htm

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