Well, renovations are almost over. A little painting and trim work left.
My new listening room has been worth the effort.
I designed a new floor plan that made use of the former sunken living room ( one step down ) as part of a listening room/HT, when I realized that 9x14x23.5 made an almost perfect Golden Cubiod.
I used the Golden Ratio of 1.618 times ceiling height, that result gives width, then times 1.618 for that result for length.
Then for speaker placement multiply ceiling height times .618 gives distance to center of the woofer from the back wall.
then width times .276 times (width * 5 ÷ 18) gives the dimension from the center of the woofer to the right or left wall.
These are mathematical formula known as Golden Ratio ( 1/2 of Pi ) and a Fibonacci sequence. The three major modes created within the listening space are indivisible, and therefore will null rather than beat
I was very fortunate to have such dimensions to work with. All I had to do was put up a 14' wall and move some doors to get it.
I realize that not many will have the chance to choose their room dimensions - but the formulas work great for speaker placement.
BTW, this is essentially how AES determined their dimensions for the AES standard listening room of 10'x16'x26.
My system ( no other changes ) sounds dramatically better - far more than I would have believed.
Later
Ken L
My new listening room has been worth the effort.
I designed a new floor plan that made use of the former sunken living room ( one step down ) as part of a listening room/HT, when I realized that 9x14x23.5 made an almost perfect Golden Cubiod.
I used the Golden Ratio of 1.618 times ceiling height, that result gives width, then times 1.618 for that result for length.
Then for speaker placement multiply ceiling height times .618 gives distance to center of the woofer from the back wall.
then width times .276 times (width * 5 ÷ 18) gives the dimension from the center of the woofer to the right or left wall.
These are mathematical formula known as Golden Ratio ( 1/2 of Pi ) and a Fibonacci sequence. The three major modes created within the listening space are indivisible, and therefore will null rather than beat
I was very fortunate to have such dimensions to work with. All I had to do was put up a 14' wall and move some doors to get it.
I realize that not many will have the chance to choose their room dimensions - but the formulas work great for speaker placement.
BTW, this is essentially how AES determined their dimensions for the AES standard listening room of 10'x16'x26.
My system ( no other changes ) sounds dramatically better - far more than I would have believed.
Later
Ken L
Hey ken,
Good to see you back from the land of sawdust & gypsumdut 🙂
Dedicated listening room -- Good.
dave
Good to see you back from the land of sawdust & gypsumdut 🙂
Dedicated listening room -- Good.
dave
Thanks Dave
Glad to be back.
before we moved a bunch of furniture out it had already gotten dusty -
so now we're dealing with cleaning everything diligently.
it looks like Circletron has picked up on fabinocci stuff pretty well
<grin>
later
Ken L
Glad to be back.
before we moved a bunch of furniture out it had already gotten dusty -
so now we're dealing with cleaning everything diligently.
it looks like Circletron has picked up on fabinocci stuff pretty well
<grin>
later
Ken L
Hi, I'm new to all this but have been listening to music through a Sansui QRX 5500 out to 4 Sansui 2700s since 1975 with excellent results (I think)! However, I'm about to retire and I been toying with the idea of a dedicated sound listening room. I'll be in the "Fixed Income" crowd and funds will be limited so the Golden Trapagon idea really appeals to me. Now I know nothing about Geometry, Algebra, and all the other mind-numbing (to me) math that accompanies the information about listening rooms in the 'net, but I've come up with a scaled down model of the George Cardas idea: Front wall is 5Hx8W, back wall is 6Hx10W, and the room length is 13' (5+8). The math is as follows: Downsize the Cardas original front wall, from (8Hx13W) into my 6Hx10W back wall [(8/1.272) and (13/1.272)]. Then to build my new front wall from that: (6/1.272 and 10/1.272). The result is a trapagon with a 5Hx8W front wall, a 6Hx10W back wall, closing a 13', or 16' Long room. MY QUESTION: Will this work?
Thanks for the report. Room dimensions do make a noticeable difference. Nice that you were able to do this. 
I have the CARA room simulation software and my be able to simulate your room and speaker placement. Would be interesting to play around with.
Non-parallel surfaces also seem to help a lot.
I have the CARA room simulation software and my be able to simulate your room and speaker placement. Would be interesting to play around with.
Non-parallel surfaces also seem to help a lot.
Deliberately making a medium-sized room smaller is not very clever, especially if you can't even stand up...?
I know it sounds odd, but I plan to go into the room to listen only - You see, I arrange my music listening sessions to last about 3 hours: I take time to record a sequence of songs I like to listen to one after the other, on my 7" Reel/Reel machines, and each session lasts about (+/-) 3 hours. All my equipment is outside my listening room. I start the tape, I enter the room and lay down on my easy chair, and for 3 hours I just drift into whatever far away mental places the music may take me. So, no, the height of the room is actually good in my book - I'm planning on getting the ceiling done in space-themed (galaxies far away) wall paper to create the illusion of traveling there.
Thank you for your observation/comments but, can you answer my question on whether or not my "Diminished Trapagon" will work as intended?
Sorry, no time at all. 🙁 I did find the software, but will have to install it on my current computer. Possibly in a week or 2.
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