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  1. Replies
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    The Acoustic Center of a driver is usually...

    The Acoustic Center of a driver is usually somewhere around the vertical plane of the voice-coil.

    So, measure the distance between the 2 voice coils.

    :)
  2. Nice Story Mac! Loved the exploding cigarettes...

    Nice Story Mac!

    Loved the exploding cigarettes part.

    :)
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    Ultramax, If your intent is to flip the...

    Ultramax,

    If your intent is to flip the speakers ( resell > move them on ), then I would advise you to just leave the networks as is ( recapping will lower their value ).

    OTOH, if you intend to...
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    Not "Factory" but none-the-less, a nice custom...

    Not "Factory" but none-the-less, a nice custom build.

    Twin 515b woofers loaded as seen will be quite mid-bass heavy and needing some help in the LF.

    Pretty neat, all-in-all .

    :)
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    Personally, I'm a compression driver and horn...

    Personally, I'm a compression driver and horn type of guy.

    As a result, I wouldn't be spending much more than $100 Cdn per tweet ( and also I'd be looking for a tweet with a metal diaphragm that's...
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    I don't have the 033's AC impedance for you but...

    I don't have the 033's AC impedance for you but what is it that you are trying to accomplish ??

    If it's replacing the 033 with a substitute then here are some important prerequisites :

    (1)...
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    You're right the sizes of those 2 coils are...

    You're right the sizes of those 2 coils are clearly wrong ( for the LF section ) .
    - ( iow; not 0.2mH + 0.5mH > even the capacitor sizes might be suspect ) .

    You might want to track down some...
  8. For the record, here is what I saw ( the...

    For the record, here is what I saw ( the bare-bones forum architecture );

    87949

    Thanks again to both Riley & Jeff for helping me out here.

    :)
  9. Thanks to both of you. Using a different...

    Thanks to both of you.

    Using a different browser confirmed the problem lay on my end.

    Clearing out a particular area of my cache fixed the DNS error.

    Cheers for all that good information !!...
  10. LHF, stripped bare of all custom layers ???

    So, the following pic is what I see when I visit this forum.

    ( OOOPPS > there is now no way to attach pics/files )

    It's missing all the custom layers ( & the link-buttons associated with the...
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    Those look fabulous. 87947 87948 :)

    Those look fabulous.

    87947
    87948

    :)
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    FWIW, I consider Giskards measurements to be the...

    FWIW, I consider Giskards measurements to be the definitive ones for the Truextent//Be diaphragms ( no offense meant to POS or sebackman or 1audiohack or Rob or anyone else who has provided their...
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    Based on the age of those 846a(s) and the fact...

    Based on the age of those 846a(s) and the fact that the woofers have extremely narrow gaps ( as well as "loose suspensions ), my guess is that the woofer has a voice coil that is starting to rub on...
  14. Duffinator One thing I would mention is that...

    Duffinator

    One thing I would mention is that to address your complaints//observations about your current system you would be well advised ( IMHO ) to lower your crossover point to around 700 or...
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    Retnev, The cut sheets you seek just don't...

    Retnev,

    The cut sheets you seek just don't exist ( well, at least not here at LHF ).

    Never-the-less, if you continue researching the topic you'll eventually find out that the D120 was...
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    Great work!. I see you added room for a deeper...

    Great work!.

    I see you added room for a deeper compression driver.

    Nice idea.

    :)
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    Altec Valencia Upgrades

    So, Chas and I concluded the initiative that I had outlined above.

    To Paraphrase our communications ( hopefully accurately ) ;

    He didn't like the Celestion drivers that I sent ( CDX1-1747 )...
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    Great Thread ! Lots of wonderful contributions...

    Great Thread !

    Lots of wonderful contributions in here!

    Thanks!

    :)
  19. In my Experience with using DC Biasing caps one...

    In my Experience with using DC Biasing caps one is slightly better off ( when trying to combine values ) to get them closer in size to each other ( rather than say your 27uF + 1uF example ).

    It's...
  20. Hi, The displayed schematic belongs to Giskard...

    Hi,

    The displayed schematic belongs to Giskard ( who no longer posts here ) > I merely referenced it as a good starting point to the thread originator.

    Regardless; I do use a Fostex 945N bullet...
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    Why not just download REW ( Room EQ Wizard ...

    Why not just download REW ( Room EQ Wizard ) for whichever computer type that you run.

    Setup ( the recommended ) test-jig needed to measure TS parameters and then have at it.

    By far , getting...
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    Very Nice Looking Rob! :)

    Very Nice Looking Rob!

    :)
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    Great Stuff there! :)

    Great Stuff there!

    :)
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    FWIW, A few decades back I moved all my PRO...

    FWIW,

    A few decades back I moved all my PRO stuff to 1/4-20 T-Nuts + Fillister headed bolts.

    1/4-20 stuff was simply a lot easier to find at the time.

    :)
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    The 30923 attenuator circuit is a very useful way...

    The 30923 attenuator circuit is a very useful way to reduce the midrange based "horn-shout".

    Unfortunately, it can't address the HF deficiencies of the 806 driver.

    Worth noting here GDM ( from...
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