Polarize Vs. Non-Polarize Caps.

Discussion in 'General Electronics Chat' started by Lotus, Oct 11, 2007.

  1. Lotus

    Thread Starter New Member

    Oct 11, 2007
    4
    0
    I'm a newbie both in here and in electronics, but i must say that you have a great forum. :)
    I have some questions concerning capacitors:
    Can i replace a polarized electrolytic cap with another one non-polarized polypropylen or film in a hi-fi speaker crossover?

    What you guys think are best, polypropylen or film caps ?

    Thanks.
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Poly would probably be a bit better, as to performance. But look at the price per microfarad compared with electrolytics and you will probably want to stay with the polarized caps.
     
  3. carcia

    New Member

    May 12, 2006
    2
    0
    polarized caps I think is the best, the price make difference
     
  4. nanovate

    Distinguished Member

    May 7, 2007
    665
    1
    @OP
    it depends on which caps you are replacing. If they are in the signal path then you should use the high quality film caps. If they are for bulk capacitance or decoupling then the price (and size) calls for Al electrolytic
     
  5. Lotus

    Thread Starter New Member

    Oct 11, 2007
    4
    0
    Thanks for the input guys.
    Maybe i stick to electrolytics.
     
  6. cumesoftware

    Senior Member

    Apr 27, 2007
    1,330
    10
    A polarized electrolytic cap in a crossover seems strange, to say the least. I think you may have a non-polarized aluminum electrolytic cap (yes, those exist too). If you have to replace, you can use a mylar cap, which is better for sound than a polipropylene one. Of course, the better, the more expensive will be.
     
  7. Lotus

    Thread Starter New Member

    Oct 11, 2007
    4
    0
    What you guys think of these caps ?

    [​IMG][/IMG]
     
  8. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Nice color. Lots of capacitance there. Is that a Phillips logo?
     
  9. Lotus

    Thread Starter New Member

    Oct 11, 2007
    4
    0
    Yes, polyester film from Philips. Are they any good?
     
  10. mozikluv

    AAC Fanatic!

    Jan 22, 2004
    1,437
    1
    having caps in an audio signal path is either, it has to be there or avoid using it.

    about the phillips polyester cap, in general its okay but a metallized poly is better. however between polyester and tantalum, tantalum would be the better choice.

    a polypropylene would be a good choice since it has nearly the same relative qualities of DF and DA as polystyrene. these 2 however has a considerable cost factor.

    for an open pocket a teflon cap will nicely do:)

    moz
     
  11. nanovate

    Distinguished Member

    May 7, 2007
    665
    1
    polycarbonate is another option.

    I'd be careful with tantalum though.
     
  12. cumesoftware

    Senior Member

    Apr 27, 2007
    1,330
    10
    We are talking about crossover networks, therefore, AC circuits. No polarized caps there.
     
Loading...