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In Reply to: i asked the same question....... posted by mikel on February 23, 2007 at 06:09:56:
How far from the front wall are the speakers?How far are Speakers from side walls?
How far from the front wall is the main chair?
Are speaker and chair placement based on Cardas Golden ratio formulas? (e.g., Speakers = .276 from side wall; .442 from front wall; etc.)
If I read you post correctly, you provided a 37 x 25 foot space and Rives designed you a 29 x 21 x 11 foot room, is that correct??
Was your audio goal to simulate a Large Orchestra -or- an Intimate 3 Piece Jazz band and/or Small string Quartet -or- both?
Follow Ups:
first; the current pictures on my system page are out of date; i have different speakers and they are in different spots.the new speakers (above) are the Evolution Acoustics MM3's. in the picture above they are 9'6" off the wall behind the speakers. the picture also shows them 14'6" apart (center of tweeter to center of tweeter).
since i took that picture i moved them (1 foot closer in on each side)to 12'6" apart but still 9'6" to the wall behind the speakers.
doing the math using a 21' width; at 12'6" apart the center of the tweeter is 4'3" from the sidewall.
i set up my listening position at the top of an equalateral triangle. so my ears are also 12'6" from each tweeter. i have not figured the exact distance from my ears to the front wall.
as a starting point i aim the speakers at a point halfway between the outside of my shoulders and my ears. which is how they are aimed now.
i do not use the Cardas formulas per se.....although some of my setups might be there by accident. my acoustician thinks that ratios are not a valid way to properly set things up as different frequncies act differently at different lengths. any ratio likely works at some sizes and not at others.
i'm no expert at room design; however my designer is considerably more experienced than Mr. Cardas. i am not invalidating Cardas ratios; just saying that the issues are not that simple. Cardas is a good place to start for the DIY'r.
yes; i provided the 37' x 25' in my barn with any height that we needed. Rives (Chris Huston) came up with 29" x 21' x 11' as ideal.
my goal was to be able to recreate all types of music; the toughest of which is large scale orchestral. once in the room i discovered that to harness the potential of the room i would need speakers with much more dynamic capabilities than my Kharma Exquisites.
doing intimate music correctly requires lots of immediacy and microdynamics; which was initially a challenge. my previous small room excelled at intimate music since i was listening in such a near-field environment.
once fully optimized (which point i now feel i am approaching) a properly designed large room can really deliver the whole performance envelope of anything from the most dynamic and complicated to the most delicate and simple.
my opinion is that the room is equally capable for all types of music. OTOH so few systems/rooms can do justic to full scale orchestral music that some might see that as it's strength.
did you compare the regular GPA's to the SE's? Any difference?
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