With your speaker you should be able to take near field measurements and use the Vituix diffraction tool and merging far field responses if they turn out to be reasonable. Outdoor measurements are great if you can do them properly. Lifting the 60Kg speaker high enough off the ground to get a cleaner response than indoors is easier said than done.
Have a read of the Vituix Measurement preparations if you haven't already and have a read of hifijim's textreme build thread where he goes through most of the simulation process in Vituix.
Have a read of the Vituix Measurement preparations if you haven't already and have a read of hifijim's textreme build thread where he goes through most of the simulation process in Vituix.
In my experience, the best way to make gated far-field measurements in a room is to pull the speaker out into the middle of the room. Raise the speaker high enough so that the tweeter and midrange drivers are at least 36 inches from the floor. More height is better, but don't raise the speaker so high that the ceiling or wall is the closest boundary.
Now push all the furniture out of the way. If the minimum distance from the midrange and tweeter to the floor happens to be 36 inch, you want to create a sphere of open space around the speaker 36 inches in radius. You also need to create a sphere of open space around the microphone 36 inches in radius.
Outdoor measurements: I have made outdoor ground plane measurements of my system, with 20 feet to the nearest boundary. I wanted to see if I could get a better measurement than the near field technique. Answer - I could not. The ground plane measurements were close enough to the near field to confirm that the near field was done correctly. However, the ground plane measurements had some "wiggles" in the frequency and phase responses, enough to affect the simulations. The near field measurements were very smooth and even, and they closely followed text-book theory.
So I would recommend making near field measurements in your room. These are 2-pi responses. Then modify the near field response by applying the theoretical diffraction response of the baffle, which will convert the near field measurement into a 4-pi response. Then merge the 4-pi near field into the gated far field response. There are many tools available to do all these manipulations, but I have found VituixCad to be very useful. Kimmo (the author and developer) has excellent documentation and videos.
Now push all the furniture out of the way. If the minimum distance from the midrange and tweeter to the floor happens to be 36 inch, you want to create a sphere of open space around the speaker 36 inches in radius. You also need to create a sphere of open space around the microphone 36 inches in radius.
Outdoor measurements: I have made outdoor ground plane measurements of my system, with 20 feet to the nearest boundary. I wanted to see if I could get a better measurement than the near field technique. Answer - I could not. The ground plane measurements were close enough to the near field to confirm that the near field was done correctly. However, the ground plane measurements had some "wiggles" in the frequency and phase responses, enough to affect the simulations. The near field measurements were very smooth and even, and they closely followed text-book theory.
So I would recommend making near field measurements in your room. These are 2-pi responses. Then modify the near field response by applying the theoretical diffraction response of the baffle, which will convert the near field measurement into a 4-pi response. Then merge the 4-pi near field into the gated far field response. There are many tools available to do all these manipulations, but I have found VituixCad to be very useful. Kimmo (the author and developer) has excellent documentation and videos.
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