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Thread: Compression Assy Alignment v.s. V C Alignment

  1. #1
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    Compression Assy Alignment v.s. V C Alignment

    The 511/808 vc lines up w/515 vc axially
    In the 811/808 application the bug screen and 515 screen line-up axially also.


    Question: is the compression assy output plane (assuming the screens are in the intfc plane)
    a more correct alignment feature (from a listening standpoint)
    OR is the VC align. still "king of the hill"


    Note: dimensions taken from A7 cabinets w/factory mtd sp.

  2. #2
    Administrator Robh3606's Avatar
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    Hello

    I have always used the VC for the alignment. That said the best way is to either go for the deepest null at crossover with one of drivers polarity reversed or use the Impulse response.

    Rob
    "I could be arguing in my spare time"

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    Impulse no.s

    Quote Originally Posted by Robh3606 View Post
    Hello

    I have always used the VC for the alignment. That said the best way is to either go for the deepest null at crossover with one of drivers polarity reversed or use the Impulse response.

    Rob
    I guess w/all horn sp. the impulse numbers would be close enough to not bother w/it..

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    Impulse response

    Is there a way to do an impulse response w/o
    spending a lot on equipment..?

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    Senior Member ivica's Avatar
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    Quote Originally Posted by Fort Knox View Post
    Is there a way to do an impulse response w/o
    spending a lot on equipment..?
    I think that Robh3606 suggestion is very easy to realize, but some kind of microphone is necessary. Measuring minimum "reading" at the crossover frequency with inverted (or direct) polarity (depending of the network order) of one driver (to the other one).

    Regards
    Ivica

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    MIC ck

    Quote Originally Posted by ivica View Post
    I think that Robh3606 suggestion is very easy to realize, but some kind of microphone is necessary. Measuring minimum "reading" at the crossover frequency with inverted (or direct) polarity (depending of the network order) of one driver (to the other one).

    Regards
    Ivica
    Good Idea....w/mic (Radio Shack meter) @ x-over freq (From test cd) I had no vol adjust
    on EQ slider ..so I rev...term. on horn.. and got respon.... on meter
    (and made sp.. bass heavy)....

  7. #7
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    Polarity..Congradulations

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    Here's some of the rag-tag stuff I had to work with..
    all the horns terminals were marked ...but if I remember
    right..you may have to run the 811 backward porlarity...

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