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Speaker line characteristics

Discussion in 'Electronic Repair' started by klem kedidelhopper, Dec 18, 2012.

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  1. This question was posed on another group but wasn't really answered.
    There is a PA installation with several zones . One zone is a bell
    tower which has a separate speaker in it. The speaker is inaccessible.
    The DC resistance of that line is 11 ohms. How can an installer
    determine if this is a 70, or 25 volt speaker and which tap it may be
    set at? Or perhaps it's just an 8 ohm speaker with 3 ohms of cable
    resistance added? Is there n easy way to do this without an impedance
    bridge? Thanks, Lenny
  2. Phil Allison

    Phil Allison Guest

    "klem kedidelhopper"

    ** One only has to add say a 100 ohm resistor in series with the speaker -
    if the level drops dramatically it is 8 ohms.

    An impedance meter is invaluable when troubleshooting line voltage PA
    systems - but even that will not tell you if a line matching tranny is 70 V

    ..... Phil
  3. Phil Allison

    Phil Allison Guest

    "Michael A. Terrell"
    ** ROTFL !!

    The Terrell fuckwit retard has MISREAD my post - as always.

    The "you" in my final sentence above refers to OP's problem - ie testing
    just the speaker line with no ability to inspect the tranny or speaker.

    ..... Phil
  4. Phil Allison

    Phil Allison Guest

    "Michael A. Terrell Autistic Retard "

    ( snip pile of utter SHIT)

    ** **** off to hell - you rabid, lunatic, fuckwit TROLL
  5. Phil Allison

    Phil Allison Guest

    "Michael A. Terrell Autistic Retard "

    ** Only quadrupeds - with big ears.
  6. Michael, would it be possible to please send me a PDF of that
    schematic? I can't get that link you posted to work. Thanks, Lenny
  7. Leif Neland

    Leif Neland Guest

    klem kedidelhopper kom med følgende:
    Did you try the
    Download >> To download the file, please, click here ! << Download

    Worked fine for me.

  8. Robert Macy

    Robert Macy Guest

    I can't get the download to work, either.

    Any clicking on active areas takes me back to the same screen, but
    never a download, or potential for download.
  9. Robert Macy forklarede:
    Are you using some paranoid browser settings, like rejecting cookies,
    hiding referer or disabled javascript?

    The site seems to have measures to keep leeches away, perhaps you look
    like that ;-)
  10. Robert Macy

    Robert Macy Guest

    the web page
    shows your quoted line in my browser, but when I hold the cursor over
    the "To download ..." section this shows:
    which looked the same so I assumed something was wrong ....without
    trying. I've had these 'circular' links in several commercial webpages
    which were a complete waste of time, so again I didn't even try.

    but will now:
    and YES it comes up with the 'save' window ?!

    Guess the lesson is to try, NEVER assume.

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