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Thread: 2397 and stereo imaging

  1. #1
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    2397 and stereo imaging

    Just wondering what effect these have on imaging. I understand they have the uncanny ability to prevent you locating point source. What are the pros and cons of these horns? TIA.

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    Administrator Mr. Widget's Avatar
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    It's been years since I listened to mine. I did like them enough to not sell them, but can't remember the details of their imaging. I do remember needing to control early reflections as these horns really do have a wide pattern.


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    Senior Member Ian Mackenzie's Avatar
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    I have used the 2497 in the past too.

    Mr Widget is correct.

    The 2497 has 140 degree horizontal dispersion.g

    The effect of this is a big open presentation but the image is diffuse because the horn is sending early reflections to the immediate room boundaries. This is bad for pin sharp imaging.

    What this means to you is that you would need to move the horn/loudspeaker away from room boundaries (at least 4 fee) to reduce the the early reflection or deploy room treatment both

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    Quote Originally Posted by Ian Mackenzie View Post
    I have used the 2497 in the past too.

    Mr Widget is correct.

    The 2497 has 140 degree horizontal dispersion.g

    The effect of this is a big open presentation but the image is diffuse because the horn is sending early reflections to the immediate room boundaries. This is bad for pin sharp imaging.

    What this means to you is that you would need to move the horn/loudspeaker away from room boundaries (at least 4 fee) to reduce the the early reflection or deploy room treatment both
    I thought the imaging issue was a function of the vanes? What purpose do they serve?

  5. #5
    Senior Member Ian Mackenzie's Avatar
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    In your first post you asked for the effect the 2397 has on imaging the pros and cons of using these horns. I have provided a responses.

    When you say you "understand" are you saying what someone said "their opinion"?

    Unless you have these particular horns to evaluate an armchair discussion on the why's and wherefore' of the horn are academic. It's how they will complement your particular system .
    that matters. JBLhad published dispersion curves for you to evaluate. Westlake Audio used a similar style of horn and Austbergers monitors use a horn with vanes. So l would not loose sleep over that.

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    Senior Member Hoerninger's Avatar
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    Quote Originally Posted by gasfan View Post
    ... function of the vanes? What purpose do they serve?
    Think of a multicellular horn designed for wide dispersion, there is space between the segments. These spaces can be filled, now there are vanes.

    There is another point:
    The horizontal dispersion is made by several segments, the acoustic source of these is somewhere at the throat of the horn.
    The vertical spreading is made by defraction as the height is kept "small" and it does not change all along the way. So the source is at the mouth.
    As he brain is not capable to build a source of sound in under these circumstances there is no precice stereo imaging.

    (A wide dispersion horn is problematic in a "normal" home environment, of course.)
    ___________
    Peter

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    Quote Originally Posted by Hoerninger View Post
    Think of a multicellular horn designed for wide dispersion, there is space between the segments. These spaces can be filled, now there are vanes.

    There is another point:
    The horizontal dispersion is made by several segments, the acoustic source of these is somewhere at the throat of the horn.
    The vertical spreading is made by defraction as the height is kept "small" and it does not change all along the way. So the source is at the mouth.
    As he brain is not capable to build a source of sound in under these circumstances there is no precice stereo imaging.

    (A wide dispersion horn is problematic in a "normal" home environment, of course.)
    ___________
    Peter
    Thanks, I was about to buy a pair but I understand now they would not be suitable for my purpose.

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