The Golden Ratio of 1.618
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 9th October 2012, 02:44 AM #21 phivates   diyAudio Member   Join Date: Jan 2011 Location: Willamette Valley GR There's another ratio hidden in all this, the square root of phi, 1.27. Gets you there, just more gradually.
Remlab
diyAudio Member

Join Date: Apr 2011
Location: Mission Viejo Ca
Quote:
 Originally Posted by rjbond3rd Try: 1. Find the cabinet volume 2. Find the volume's cube root. That's your 1.0 dimension. 3. Multiple the cube root by .618 and 1.618. Those are the other two dimensions.
Or the smallest dimension x 1.618 and then the smallest dimension x 2.618
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Last edited by Remlab; 9th October 2012 at 06:42 AM.

planet10
frugal-phile(tm)
diyAudio Moderator

Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Quote:
 Originally Posted by Remlab Or the smallest dimension x 1.618 and then the smallest dimension x 2.618
Which is the same as smallest x phi = middle. Middle x phi = longest.

ie 1.618 ^2 = 2.618. Also 1/1.618 = 0.618

dave
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Remlab
diyAudio Member

Join Date: Apr 2011
Location: Mission Viejo Ca
Quote:
 Originally Posted by planet10 Which is the same as smallest x phi = middle. Middle x phi = longest. ie 1.618 ^2 = 2.618. Also 1/1.618 = 0.618 dave
Very "fun" ratio to play with. Probably the easiest method to remember though for the mathematically uninclined is the one I stated.
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It's not what you don't know that causes trouble. It's what you do know that just ain't so..Mark Twain

Last edited by Remlab; 9th October 2012 at 11:45 PM.

Silent Screamer
diyAudio Member

Join Date: Feb 2012
Location: Brisvegas
Quote:
 Originally Posted by rjbond3rd Try: 1. Find the cabinet volume 2. Find the volume's cube root. That's your 1.0 dimension. 3. Multiple the cube root by .618 and 1.618. Those are the other two dimensions.
If he has a minimum dimension of 13.335 then wouldn't you?

1. 13.335 / .618 = 21.578
2. 21.578 * 1.618 = 34.913

21.578 (X3) = 10.047

planet10
frugal-phile(tm)
diyAudio Moderator

Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Quote:
 Originally Posted by Silent Screamer If he has a minimum dimension of 13.335 then wouldn't you?
See post #4. We are starting to go in circles

dave
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community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA

Silent Screamer
diyAudio Member

Join Date: Feb 2012
Location: Brisvegas
Quote:
 Originally Posted by planet10 See post #4. We are starting to go in circles dave
Yeah but you said 6, I said half a dozen

 10th October 2012, 05:38 AM #28 picowallspeaker   diyAudio Member     Join Date: Apr 2007 I remember that the Golden ratio was in a book ... It was about ORIGAMI and it was the right dimensioned rectangle to start to fold ....
 10th October 2012, 06:56 AM #29 Remlab   diyAudio Member   Join Date: Apr 2011 Location: Mission Viejo Ca One thing that can ruin it though, is any type of bracing or solid object within that "golden ratio" space. And if the box is small enough and the magnet is large enough, that can ruin the effect too.. __________________ It's not what you don't know that causes trouble. It's what you do know that just ain't so..Mark Twain
 10th October 2012, 08:15 AM #30 tinitus   diyAudio Moderator R.I.P.   Join Date: Nov 2005 many golden ratios are possible in a speaker box 1. each individual surface 2. each individual surface in relation to other surfaces 3. cubic relations, volume, or volumes 4. mounting of each driver in relation to surface 5. relations between several drivers 6. bracing I guess the list could be longer

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