Perfect Speaker Placement - Put next to the back wall as much as possible.


I happen to find an good article about the ideal speaker placement. 
(Easiest version without numbers & formulas that I can’t honestly understand :D)

I’d like to share. 

Personally I find two things interesting.

1) Only use 40% of the room area (38% rule)

2) Put the speaker as close as possible to the back-wall (next to bass trap)

Of course, minor adjustment would be required depending on speakers.
Still, I think this is helpful to figure out the very first step.

Happy listening.

p.s. what should I do with half of the room left... :?
There has to be some type of program where you rnter your room dimensions and it will give you different speaker placement distances from the front wall in order to tackle specific dips.

Like, if you have a dip at 40hz, thats a 28 foot wavelength so at what speaker location will that wave cancel itself out at...

Room treatments are so huge in the way your setup sounds and once you get used to them theres no going back.  You just want to treat every square inch with absorption or diffusion.
I’ve been enjoying dsp as well.  Its kind of fun.  Its somewhat like changing speakers in and out without changing speakers in and out.  It allows me to still enjoy my high quality speakers but with just a different flavor of sound.

To clarify, you guys are saying that your speakers are 38% into the room and your listening seat is also 38% into the room?  This seems like it would be a nearfield setup in anything less than a 40 foot deep room...

I thought it was a good article mainly talking about small monitor speakers in a nearfield listening position with bits about larger speakers thrown in. For small speakers, I would suggest his recommendations. I have done it this way with good success. But for larger full range speakers, you need the speakers out from the wall, way out. There are many articles on speaker placement and for example the Cardas method, he states recommendations for planer speakers and for box speakers, nearfield or not, and for square vs rectangle rooms.
The Wilson duette speakers sound very good up against the wall whereas the Wilson Alexia 2’s would not.
I also agree with audio2design and many others on these forums: never listen to millercarbon. I think it’s outrageous that MC compares his low fi system with Mike Lavigne’s system, that’s an embarrassment to Mike. 
To clarify it is your ears that are supposed to be at 38% from the front wall or the back wall. Nothing to do with speaker placement.

"In the studio, we don’t listen to music. We listen to instruments, voices and mixes.

"B I G difference."

Oh?  How so within the framework of acoustics or perceptive differences?

 I don’t think there is any such thing as "perfect" speaker placement as long as you have them in a room with people, furniture, and pets. However, any of the major speaker placement formulas may improve your set up just by (a) getting the speakers away from the walls, (b) introducing symmetry in the relationship between speakers, walls, and listening position, (c) ensuring that the speakers are not equally distant from boundaries in more than one dimension. Beyond that, I’m skeptical that there necessarily is anything dramatically better about one of these formulas than another (Rule of Thirds, 38%, Cardas, etc.)

I’ve found that the Allison Rule is more flexible than others w.r.t. furniture placement. The Allison Rule (as I understand it) depends on 3 measurements, namely height of the woofer off the floor, distance of speaker front face to front wall, and distance of speaker front face center to the side wall. It states that the middle of these distances should be the square root of the product of the least and the greatest of these distances. So I place my speakers about 4.5 feet in from the side walls; midpoint of the 2 woofers is about 2 feet high; the front face is about 3 feet out from the front wall. That is, 3 feet (the middle distance) is the square root of: 2 feet (the least distance) times 4.5 feet (the greatest distance). The point is to maximize the differences among these 3 measurements, within the constraints of room size and speaker placement, in order to minimize room effects.

By "back wall", the OP seems to be referring to what other audiophiles usually call the "front wall", that is, the wall directly in front of the listener (and behind the speakers). In my experience, placing speakers very close to that wall may improve bass extension, but generally is not so good for imaging/soundstage. I prefer to pull speakers away from the walls and increase bass extension by adding a subwoofer. Also, I use highly directive (focused) monopole, sealed, hybrid electrostatic speakers. These tend to minimize room effects. I get a very sharply focused center image along with a rather flat frequency response between about 10hZ and 15kHz+, without any room treatments (other than furnishings) or PEQ. Then, to widen/deepen the soundstage, I use BACCH4Mac software.