New study on loudspeaker placement

[markus76]

Earl,

When moving the listener around and looking at the frequency response window there's no case where frequency response for the opposite speaker would be higher than the closer speaker unless the listening position is very far away

P.S. Error when selecting "Piston"

[gedlee]

Markus

Thats not true at mid-high frequencies for an Abbey12c(a) at 48 degrees and about 1 meter off the wall. There is a reversal of the amplitude function over a fairly broad range. It is true that almost no other speaker does this, I agree.

What is "very far away"? My setup is about 4-5 meters from the speaker plane. Is this "very far away"?

[gedlee]

Originally Posted by Rudolf

Yes, it works for me. With decimal comma I see some weired diagrams, but the program still starts and runs. With decimal point everything is ok.

Sadly Polar_Map still doesn't run on my PC.

Thats good to know because the two programs have very common classes and one failing while the other doesn't is odd. I'll have to look for differences between the two program codes - there aren't many.

[markus76]

Originally Posted by gedlee

Markus

Thats not true at mid-high frequencies for an Abbey12c(a) at 48 degrees and about 1 meter off the wall. There is a reversal of the amplitude function over a fairly broad range. It is true that almost no other speaker does this, I agree.

What is "very far away"? My setup is about 4-5 meters from the speaker plane. Is this "very far away"?

Smaller than 50°-60° opening angle.
Could you show a larger dB range in the frequency window? Some curves don't display within the availble ±9dB.

[gedlee]

Why smaller than 50 degree opening angle? It works for me at anything above about 40 degrees.

Yes, I can change the range, but I have found that the "dipole" button, which normalizes the curves at a different frequency, usually works.

[markus76]

Pretty please?

[Pano]

Originally Posted by gedlee

This is audio - you have to expect that. "I hear what I want to hear and I know what I hear. QED"

Don't forget "You can't possibly hear that because I know that you are wrong."

[AudioLapDance]

Hi, thanks for all your great input to the forum.


I thought I had the prerequisites so I just clicked 'launch' here:

Room Response

and got this error:
CASRXT6F.txt



So instead I clicked on 'run'

and got this error:
install error log.txt



I'm just a regular North American Win7 user but I am in Canada so ... ?

Let us know if you want to do specific testing.

Cheers,
Jeff

[AudioLapDance]

Same thing with polar map:

error1.txt

error2.txt

[gedlee]

Those are the errors that I always see and I have no idea what the problem is. It reads like your computer just won't download the files. My guess is that it is the security level of your computer. It is trying to protect you from my bad software!!