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Speaker placement formula

I tried looking in the old threads and I didn't find what I am looking for. Hopefully this isn't a subject that has been asked about too much.

I am looking for a formula (I'm almost positive Martin Logan prints one in their manual) that calculates speaker placement in the room. It takes into account ceiling height also. I know about the whole equilateral triangle, but I think Martin Logan's is different. And if I'm not mistaking, ML's is a pretty common formula? I could be wrong. If anyone could help, that would be great. Thanks.

Seth
s7horton
jfrech's avatar
jfrech
1,816 posts
 
Try cardas.com or immediasound.com. Both have great papers on what you're asking...
ellery911
549 posts
 
Funny you should post this...I just went to Brystons website to get a formula for that today...I think it is supposed to be sort of a generic formula...it is as follows

(room height in ")x(.618)= distance from rear wall*
(room width in " / 18)x(5)= distance of tweeters from side walls

*the diagram showed the distance from the rear wall to be to the back of the speaker.

hope this helps,

Ellery
clueless
763 posts
 
Formulas are great but you can only use them to get a very general idea. Real rooms are a lot more complex acoustically than most formulas take into account. Few allow for furniture, wall/floor surface type, much less the polar radiation pattern or source impedance of your equipment which is apparently important in determining room response. Art Ludwig and Linkwitz have interesting stuff to say on this topic and are worth a look if you are looking at your room. www.linkwitzlab.com and www.silcom.com/~aludwig if your interested.

Good luck,

Sincerely, i remain
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