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In the Forum: Playback Listening
In the Thread: Basic guide to advanced audio
Post Subject: It depends of many variablesPosted by haralanov on: 7/29/2011
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 Romy the Cat wrote:
Still, if the change from left image presentation to right image presentation is possible with no modification of HF then would we admin that HF has nothing to do with it?

Yes, it mostly depends of how the tweeter is used. But one could never achieve the sound presentation at the left side of the illustration without using the “right” tweeter (at least to the magnitude that I’m talking about – he must not feel ANY deficiency of space) no matter his efforts to integrate it. If the tweeter cannot do certain things right, one can try 1000000 configurations without getting that effect of unlimited audio window.

 Romy the Cat wrote:
Where I think Haralanov is right is that in context of a given playback and the given HF problem the HF might change the presentation from left to right image but it is only because the HF are basically bad

In my experience, it can happen even if the quality of the HF channel is very good. I have listened a lot of acoustic systems with good tweeters, which totally collapse when I turn off one of their stereo channels. May be your midrange horn and ribbon tweeter have some features that makes them insensitive to the effect I already described.

 Romy the Cat wrote:
I do not think that it is accurate and I am absolutely insist that output of good tweeters shall not affect geometry of presentation in that way how Haralanov depicted.

It is possible they will not affect it, but I think it can happen only when the level of the HF channel is at least 7-8dB lower in comparison to MF channel and when the crossover point of the tweeter is higher than 20-30kHz… In every other case it is perfectly able to deform the geometry and size of the space (at least to my experience).

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