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What's this component called?

Discussion in 'General Electronics Chat' started by Daan Lageschaar, Sep 22, 2019.

  1. Daan Lageschaar

    Thread Starter New Member

    Jul 8, 2019
    8
    2
    Does anyone know how this big copper coil is called?
    It's part of a subwoofers crossover.
    Thanks in advance! :D
    [​IMG]
     
  2. Papabravo

    Expert

    Feb 24, 2006
    12,285
    2,725
    It is an inductor.
     
    narkeleptk likes this.
  3. LesJones

    Well-Known Member

    Jan 8, 2017
    2,304
    693
    It is an inductor. (Also known as a choke.) It will be in series with the low frequency speaker (Woofer.) to filter out the high frequencies.

    Les.
     
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  4. VulcanCCIT

    New Member

    Sep 14, 2019
    19
    9
    the combination of the Capacitor, the big black thing lol and the coil form a filter :)
     
    narkeleptk likes this.
  5. SLK001

    Senior Member

    Nov 29, 2011
    1,440
    591
    For audio frequencies, especially for subwoofer crossovers (AND high power), you need a passive, low loss filter. That means inductors and capacitors. For the inductors, they will be HUGE at those frequencies. To be low loss, that means that they will be even HUGER! As everyone has pointed out, that big copper thingy is an inductor. And although inductors are used as chokes, in this case it is wound to be very close to a designed value so as to resonate with the capacitor, which is also a precision device. A choke has a wide range of values that work, while in a filter, a PRECISION value is required.
     
  6. Daan Lageschaar

    Thread Starter New Member

    Jul 8, 2019
    8
    2
    Thanks for all your replies,
    this really cleared things up a lot for me :D
     
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