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In the Forum: Audio Discussions
In the Thread: Romy The Cat's new Listening Room
Post Subject: The peculiarity of time alignment.Posted by Romy the Cat on: 4/26/2010
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 jessie.dazzle wrote:
Assuming situation 2 is possible, receiving mid-bass primarily as reflected sound, one would have to take into account the reflected path of that sound, and how it describes the mid-bass part of the image, relative to the MF/HF part of the image; for example, the reflected mid-bass may very well originate on the left, but reach the listener's ear from the right.

I less care about direct listening left/right consequences. At I am more interested to learn about alignment. You said “take into account the reflected path” but will it be “taken into account” during the actual measurement? That is what very interesting. In midbass the wavelength is very long and it is very difficult to get “true” delay. For instance if I bring my RTA to the Bill’s room I doubt that I would be able to measure a proper alignment – he has no room for it. Somebody with true large room, I would estimate 2000 need to make this experiment once and for all, discovering how to alight the bounced wave. I am sure there a million variations to the “right” answer. The angle of the horn axis, the type and the proximity of the low pass filter on the midbass hot, the reflective characteristic of the bouncing wall and few others, so, I guess in some cases the practicality of direct midbass vs. reflected midbass alignment might be negligible or near negligible, but I do not know for sure. I know for sure that what we go over the pain or making, installing and using a proper midbass horn then we have no strength left to question the peculiarity of time alignment

The Cat

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