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Can someone check my math?

tifune

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I keep having this ominous feeling I'm using the right triangle calculator incorrectly.


My listening position is 144" from L/R. Im trying to determine proper position of front height speakers, which Denon/Auro say is 30 degrees above. My seated ear height is 44", so tweeter axis of front heights should be 127"?

It may matter that speakers have a dip in vertical response, not really sure how much effect it would have at that (or any) height as long as I can get them angled correctly once mounted
 

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tifune

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math looks correct. it's high because you are pretty distant from your mains.
don't mind the vertical if you angle them

Any tips on getting the angle correct? Maybe it's just me but the cabinet shape makes it difficult to accurately determine from eyeball alone.
 

AdamG247

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Any tips on getting the angle correct? Maybe it's just me but the cabinet shape makes it difficult to accurately determine from eyeball alone.
You could use a laser pointer. It’s what I use to do final alignment adjustments. This is the tool I use as it also gives distance measurements.
Laser tape measure
1644766300855.png
 

dasdoing

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Any tips on getting the angle correct? Maybe it's just me but the cabinet shape makes it difficult to accurately determine from eyeball alone.

you can tape a string close to the tweeter and hold it tight while at LP. should be easy to eyeball a 90 degrees angle between the string and the cabinet front
 

dasdoing

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you can tape a string close to the tweeter and hold it tight while at LP. should be easy to eyeball a 90 degrees angle between the string and the cabinet front

also you can atach the string to a microfone stand at LP and earheight. than you can actualy meassure the 90 degree angle at the speaker
 
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tifune

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also you can atach the string to a microfone stand at LP and earheight. than you can actualy meassure the 90 degree angle at the speaker

I'm not sure I'm following - wouldn't the 90 degree angle be where the wall meets the floor?
 

Hipper

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Have you been having modern art lessons?:)
 

phoenixdogfan

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I keep having this ominous feeling I'm using the right triangle calculator incorrectly.


My listening position is 144" from L/R. Im trying to determine proper position of front height speakers, which Denon/Auro say is 30 degrees above. My seated ear height is 44", so tweeter axis of front heights should be 127"?

It may matter that speakers have a dip in vertical response, not really sure how much effect it would have at that (or any) height as long as I can get them angled correctly once mounted
The angle is supposed to measure the degrees between the tweeters of the base layer and the height layer from your ears' vantage.

The height layer's tweeter center needs to be 83" above the base layer's tweeter height center. assuming the base layer tweeter is exactly the same as your ear height (a=44"), and the distance from your ear openings and the L_R tweeters is b=144".
 

dasdoing

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The angle is supposed to measure the degrees between the tweeters of the base layer and the height layer from your ears' vantage.

The height layer's tweeter center needs to be 83" above the base layer's tweeter height center. assuming the base layer tweeter is exactly the same as your ear height (a=44"), and the distance from your ear openings and the L_R tweeters is b=144".

hence the 127" he concluded
 
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