Understanding High Fidelity

Discussion in 'Pioneer Audio' started by Noodle, Aug 12, 2017 at 12:06 PM.

  1. Noodle

    Noodle LISTEN! I smell Hi-Fi. Subscriber

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    An excerpt from Pioneer's Understanding High Fidelity.....

    "Protection of tweeters against bass pulses: strong, sudden bass pulses may occur when the power amplifiers are turned on and off, and these could damage the tweeters.
    As protection, a capacitor of approximately 6-12uF should be inserted (in series) between high range amplifier and tweeter."

    My questions:
    What voltage rating should this cap be?
    Should be electrolytic, correct?
    Polar or non-polar?
     

    Attached Files:

  2. redk9258

    redk9258 Well-Known Member

    Messages:
    974
    Location:
    Illinois, close to St. Louis.
    They are built into the crossover network.
     
  3. QSilver

    QSilver Super Member

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    1,033
    Voltage i would imagine would be a little over what the amplifier could throw out if it railed. So if your amp has a rial voltage of +/-50V, you want to be over that at least.

    Electrolytic? I dont think it has to be... but that comes down to price.

    Probably non-polar if it is in series? I could be wrong...
     
  4. I LIKE MUSIC

    I LIKE MUSIC Super Member

    Not exactly.

    Look at his picture. He is using line level electronic crossovers and the amplifiers are connected directly to the speaker drivers. There is no crossover being used in the speaker its self.

    The capacitor should be non-polarized. I would use a film capacitor. Something like this.

    upload_2017-8-12_12-47-46.png

    You likely would not need this high a voltage rating and you can choose the amount of capacitance, but it was the first example that I came to.
     
    QSilver likes this.
  5. Noodle

    Noodle LISTEN! I smell Hi-Fi. Subscriber

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    Location:
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    Here's a pic attached below, of the crossover in the CS-A700 speakers I plan to use.
     

    Attached Files:

  6. I LIKE MUSIC

    I LIKE MUSIC Super Member

    In that case the capacitor will not be needed if you use the internal crossovers of the speakers. But this kind of defeats the purpose of the electronic crossovers as shown in your first picture.



    Are you going to use external electronic crossovers?
     
  7. Noodle

    Noodle LISTEN! I smell Hi-Fi. Subscriber

    Messages:
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    Location:
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    Yes, the SF-700 connected to (3) SM-700 power amps.
    Page 3 of the OM: http://www.kallhovde.com/pioneer/sm-700-om-sm.pdf
    is what I'm shooting for.

    SF-700 material
    https://www.hifiengine.com/manual_library/pioneer/sf-700.shtml
     

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