Results 1 to 5 of 5

Thread: 4410A's questions

  1. #1
    Junior Member
    Join Date
    Aug 2018
    Location
    Framingham MA
    Posts
    7

    4410A's questions

    Hi all,

    just picked up a pair of 4410A's......

    found the schematic.... I've never seen the black (-) input run the series side of the speaker crossover parts.
    But that is how its wired.... the resistor in series on tweeter looks like its been abused. the glue has burned away on it...

    Is it because of third order that the phase is shifted??

  2. #2
    Senior Member
    Join Date
    Apr 2003
    Location
    Richmond Hill, Ont.
    Posts
    4,730
    Quote Originally Posted by DJ_rockett View Post

    <<<SNIP>>>>

    Is it because of third order that the phase is shifted??

    Weird question .

    The ( before mentioned ) resistor is burnt due to those speakers being over-powered ( or the Wattage value of the resistor being too low ).


  3. #3
    Junior Member
    Join Date
    Aug 2018
    Location
    Framingham MA
    Posts
    7
    Quote Originally Posted by Earl K View Post
    Weird question .

    The ( before mentioned ) resistor is burnt due to those speakers being over-powered ( or the Wattage value of the resistor being too low ).

    attached is a pic of the schematic.... I thought they made a mistake on the in lines .... As I removed the board, they are running black (-)
    on the line that contains the series items.... I normally see the caps and stuff in series on the plus side.... So the question was why are they reversing it on this design?
    Attached Images Attached Images  

  4. #4
    Senior Member
    Join Date
    Apr 2003
    Location
    Richmond Hill, Ont.
    Posts
    4,730
    JBL has since inception ( more-or-less ) partially followed the electrical convention where the "Hot" wire is Black while the Neutral ( return wire ) is given some other color .

    JBL ( on their drivers ) typically uses the black terminal as the terminal that will give forward cone motion ( with a positive pulse applied > say from a battery ).

    Who-ever chose the color-coding of the network wires ( that you're looking at ) was most likely simply trying to remain true to JBL's historic color-coding convention ( even if it is seemingly backwards to the rest of the industry ).

    FWIW, since audio is AC, the ( series ) passive components in a crossover can be on either network leg ( even both legs ).


  5. #5
    Junior Member
    Join Date
    Aug 2018
    Location
    Framingham MA
    Posts
    7
    Quote Originally Posted by Earl K View Post
    JBL has since inception ( more-or-less ) partially followed the electrical convention where the "Hot" wire is Black while the Neutral ( return wire ) is given some other color .

    JBL ( on their drivers ) typically uses the black terminal as the terminal that will give forward cone motion ( with a positive pulse applied > say from a battery ).

    Who-ever choose the color-coding of the network wires ( that you're looking at ) was most likely simply trying to remain true to JBL's historic color-coding convention ( even if it is seemingly backwards to the rest of the industry ).

    FWIW, since audio is AC, the ( series ) passive components in a crossover can be on either network leg ( even both legs ).

    Thanks Earl!! that helped alot.... I was aware of the AC nature... I wasn't sure so much appreciate your sharing....

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. JBL 4410A's
    By sab in forum Lansing Product Technical Help
    Replies: 5
    Last Post: 04-30-2009, 06:48 AM
  2. My First Post (aka: questions, questions...)
    By maxjax in forum Lansing Product DIY Forum
    Replies: 12
    Last Post: 08-15-2008, 11:25 PM
  3. L-166 questions
    By SEAWOLF97 in forum Lansing Product General Information
    Replies: 9
    Last Post: 12-01-2007, 04:31 PM
  4. eq questions
    By eyedoc in forum General Audio Discussion
    Replies: 25
    Last Post: 01-25-2006, 06:36 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •