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Re: Need help with room placement [message #18774 is a reply to message #18770]

Wed, 07 June 2006 16:05

SteveBrown
Messages: 330
Registered: May 2009

Grand Master

Wayne, help me, DI? What you wrote sounds interesting, can you say it again in English??

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Put your left toe-in....... [message #18775 is a reply to message #18774]

Wed, 07 June 2006 16:27

colinhester
Messages: 1349
Registered: May 2009
Location: NE Arkansas

Illuminati (3rd Degree)

Have you tried toe-in? Focus the speakers to cross several feet (5' or so) in front of your listening position and then move several degrees to a toe-out position. You should find a position where the depth/imaging/soundstage comes together. Also, are your speakers along a long or short wall? Try the other wall just to see if there is a difference.

I don't have the Cardas site at hand, but look on their site for some good info on speaker placement, if you have not already.....Best regards, Colin

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Re: Put your left toe-in....... [message #18776 is a reply to message #18775]

Wed, 07 June 2006 17:59

SteveBrown
Messages: 330
Registered: May 2009

Grand Master

Thanks, Colin! I have the speakers positioned about where the Cardas site recommends - about 55" from each side, and 80" from the back. The funny thing is that the JBL horns image wonderfully, but not the 811's. So I guess the problem is solved except I like the sound of the 806 drivers better. So I guess I need to find a 2 bolt to 3 bolt adapter.

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Re: Put your left toe-in....... [message #18777 is a reply to message #18776]

Wed, 07 June 2006 19:34

colinhester
Messages: 1349
Registered: May 2009
Location: NE Arkansas

Illuminati (3rd Degree)

I bet Ron's got a set......Colin

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Re: Need help with room placement [message #18778 is a reply to message #18774]

Wed, 07 June 2006 21:16

Wayne Parham
Messages: 18789
Registered: January 2001

Illuminati (33rd Degree)

DI is directivity index. Collapsing DI is what horns with exponential and tractrix and shapes like that have. Basically what it means is dispersion angle grows narrower as frequency goes up.

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Re: Need help with room placement [message #18780 is a reply to message #18771]

Thu, 08 June 2006 09:28

Wayne Parham
Messages: 18789
Registered: January 2001

Illuminati (33rd Degree)

Watch out for nulls though. When a boundary is 1/4λ away, a null forms at that frequency. Two feet is 1/4λ of 140Hz, three feet is 1/4λ of 100Hz, and so on.

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Re: Put your left toe-in....... [message #18781 is a reply to message #18775]

Thu, 08 June 2006 17:14

Russellc
Messages: 397
Registered: May 2009

Illuminati (1st Degree)

This is exactly what I have found in my similar sized room. A7 s are in the corners, toed in to a point in front of the listening position. This gave a big Image with depth.

Russellc

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